As an example to get this started:
Braces are put on for an average of 4 years at age 16-17 while parents can still be there. There are large brackets on the social six, the only teeth not banded. Generally, you will have an activator/Bionator beforehand at age 10ish and to retain that there is a permanent retainer. Orthodontists will use any colored ligatures they want, and are known to use embarrassing colors. Headgear is often used, with 16-18 hour minimum. At most orthodontists, adjustments are made every 3-4 weeks. To retain that, you are given Hawleys to be worn full time for two years.

This is just an example, you can do whatever you want.

In my "new normal" braces would be more common, with almost everyone getting braces at some point.  People would get braces as adults, with most beginning treatment sometime between their late teens and mid twenties, but some would get braces even later than that.  Treatment times would be longer, with two and a half years being the average, and as long as four years not being uncommon.  Most people would get braces only once, but it would not be unusual for someone to go through it twice or even three times.

As for the braces themselves, they would be all metal, no clear brackets or aligners, certainly nothing like Invisalign.  Everyone would have large double tie-wing brackets, and about one in five would have all metal bands.  Even the ties and ligatures would be all metal wire, no rubber O-rings or power chains.  Most people would require headgear twelve to sixteen hours a day, so it would be common for people to wear headgear away from home, while at work or shopping for groceries, etc.  Other orthodontic accessories such as elastics, tongue spurs, and expanders would be common, and most people would have at least one of those, in addition to headgear.  The really bulky and cumbersome appliances that make it nearly impossible to speak clearly would be very rare.

There would be no stigma or embarrassment associated with getting braces.  It would just be one of those things that almost everyone goes through, like wearing eyeglasses.

@braces37 what’s your new normal for braces?

In my new normal, Invisalign is far too expensive for most patients.  Costs of installing brackets have come way down so a technician does it in about ten minutes.  The mouth is scanned as with Invisalign and this allows the dentist, yes – not an orthodontist, to drag each tooth to the desired position on the monitor.  A custom tray is created as is used with teeth-whitening kits the dentist sends home with patients.  The tray is used to quickly apply etching compound to upper and lower arches in less than a minute.  The computer has created an installation arch with all the brackets perfectly placed on it to get the final result.  The installation arch is like a large plastic inner arch of a face now.  Brackets have inactive adhesive already on the tooth side of the bracket and it is activated as it touches the etching material, which then reacts to form part of the adhesive.  The installation arch releases all the brackets, UV light cures the glue and the mouth is rinsed of excess etching material.  Molar bands are standard with three tubes and a hook, with possibly an expander being installed if necessary.  Bands are installed on second molars more traditionally with spacers but have the inactive adhesive that reacts with etching compound.  Brackets have sliders for arch wire installation.  There are no more donuts and power chains are created with ligature wire when needed.

After ten minutes and less cost in hardware than a decent restaurant meal with drinks, a patient has two arches of braces installed along with molar bands.  Ceramic brackets are still an option; however arch wires are always steel.  There are no tooth coloured arch wires.  Acrylic appliances are created with an automated system in which lab technicians are given schematics of how the wires are formed in 3-D printed molds of the arch and then acrylic is 3-D printed into the molds by the computer.  This works for bite plates, retainers and even twin blocks.

Face bows are pretty much as before, but traction systems have been updated.  A pad has release modules, but instead of flexible strips with multiple holes in them, coming out of the release modules, additional bars just like the face bow is made of, come out of the release modules and form a triangle where they hook onto the face bow.  Face bows have outer bars that are varying in length so that where the bars from the release modules connect; they cause the correct line of force to be applied.

With bracket installation being so cheap, re-treatment for a relapse is more akin to someone whitening their teeth every six months or so.  Retainers are restricted to Hawley.  Essex retainers can't be created as cheaply.  Bonded retainers are too expensive to install so seldom used.  Just to keep costs down, molar bands are seldom removed if headgear was ever used, or if it may be in a future treatment.  As a re-treatment starts, the patient may be instructed to wear their old headgear for a while, or perhaps a lot, if it was not worn enough in the previous treatment.  All-day wear of headgear is quite common, even in adults, however it is often only required for a month or so, and this sometimes happens between treatments.  Patients that had ceramic brackets for one treatment, often decide to go to all steel on subsequent treatments.

First, My New normal would not be a normalisation of adult braces because I like the idea that having braces as an adult is not common and is a result of the brave decision to overcome the embarrassement.

So I would let the teenagers to be the usual 2 years metal braces wearer (ceramic or Invisalign becoming far too expensive for 95 % of the population)

But I'd like a new kind of orthodontic treatment be created, not only to straighten teeth, but also to avoid strong medical issues (back and head aches, dental loosening) appearing suddenly at any age of adult life on 4-5 % of western population (majority of women), whether if they had braces before of not. This would be the only way to treat the symptoms and persons concerned would have no real choice to avoid the treatment (except those who accept to lose their teeth and bear the growing pain).

This treatment would be with low force (to avoid complications) metal braces (or ceramic if you're very rich), molar bands, upper and lower metal expanders, herbst appliance and sometimes, for the unluckiest ones, tongue cribs and or highpull headgear to be worn at least 16 hours a day for the half part of the treatment (and would be fixed 24/7 for those who do not respect the wearing time). Due to the low force, the treatment would last from 4 to 8-10 years on average and could be endless, even for life, for the worst case (lifetime for 1 % of treated patients).

These persons would be added to adults who voluntarely wear braces like nowadays, so you would not know if an adult wear braces because he wants or he has to.