There are quite a lot of people out there with older browsers. You probably never meet them. I work for a company that gets processes 700k well distributed surveys per year, and there's always a bunch of old Chrome versions. Probably because it's "SamsungBrowser". That doesn't upgrade so easily. There are also people using third party browsers for points: you do a task, you get points. It's totally unclear when those get updated. Last month, there is an entry for Chrome 103 running on some old version of CrOS. I also see the occasional PlayStation browser, and other uncommon devices. And then we're talking Western Europe. The situation in e.g. Slovenia and Chile, where we also occasionally collect data, is different, probably a money issue.

And I wish you wouldn't update Edge so aggressively. Only last month, it turned out that Edge on Android refuses to play a video if it's under 5 seconds.

BTW, Apple does update the browser on older OS versions.