I had braces (all bands) in the early 80s. Before I got braces, I had an expander for a few months. On the day the expander was removed, I got bands on my upper and lower molars and on my lower incisors. I also got headgear that day. That appointment took a couple hours. A few months later, my upper incisors were banded. A couple months after that, my canines and premolars were banded. Those appointments took about an hour. The bands were pre-formed with brackets already attached, but for each tooth, the orthodontist had to find the right-sized band through trial and error. That took a long time. Placing the bands on my teeth was fast in comparison. Then the orthodontist had to install the archwires, which took a while, because the wire was stiff, and had to be hand-bent to fit the irregular alignment of the teeth. The archwires were held in place with individual wire ties on each tooth. Toward the end of my treatment, I got archwires with a couple of complex loops in them. Instead of individual ties, the archwires were held in place by a long strand of ligature wire, wrapped and twisted around the brackets on the bands.
I don't know what it was like in the rest of the US, but in my town, in the early 80s, everyone who got braces got bands on all their teeth. The first time I saw anyone with bonded brackets was about a year after I got braces. By the late 80s, brackets had become more common than bands, but it was still not unusual to see someone with all bands as late as the early 90s. After that though, bands became much less common. I'd still see people with all bands, but maybe only once or twice a year. The last time I saw anyone with all bands was about 10 or 12 years ago. It wasn't anyone I knew, just some young woman I saw walking through a store, so I don't know the circumstances of her case, whether her treatment required bands, or if she was just one of the last patients of an older orthodontist.