And I could swear there was a share button, where did it go?..

Other games that come to mind: Golden Idol series, Buckshot Roulette, Dome Keeper, Arctic Eggs, Cruelty Squad. Sonic Colors, kind of.

It should.

I have no idea how to do that in Windows though.

on Linux I think there's a kernel level driver, but I'm not sure

You either catch and enforce it with a linter (e.g. https://golangci-lint.run/docs/linters/configuration/#revive) (in which case you don't need AI to tell you the current state, you just add the same config to all projects) or you don't enforce it (because everyone will forget unless it's automated)

With the added downside of less choice and/or delayed releases

I have 500+ games on GOG and 1000+ in Steam. I still do regular backups of GOG installers to a local hard drive with lgogdownloader, but at any given point in time I am likely to have somewhere around 30 games installed (some of which I play maybe once a month, some are just sitting there so that I don't forget to get around to them). A lot of those games have been released fairly recently and are still getting patches, and I want to have those patches, because it's fairly normal for games to release in a broken state. Given all that, having launchers is kind of a necessity (and playtime, achievements, cloud saves, wine prefix management and social features are a nice bonus to all that).