https://whatpwacando.today/ is a nice site to test things out. You should see the option to install on Firefox for android, as well as verify what features work.
Glad it finally landed in main, I’ve been using nightly to install PWA’s for a while. It worked fine, but having the two different browsers to juggle for initial install was a pain.
I’ve been windows-free for about 8 months as well. I’m a more casual gamer so i haven’t had to venture out of steam proton yet (but i’ve got bottles on hand to experiment anyway) A few of the games i tend to return to every few years will definitely need bottles.
I built a beefy system, and I was initially planning on running windows (or one of the de-microsofted builds) on a vm with pass-through GPU (shunting my linux over to the on-cpu gpu when im running it) but so far i’ve had no need to continue setting that up. I proactively placed all my steam games on an ntfs filesystem just in case i do in the future.
Either way, i’m glad to have the flexibility to make windows work without dual boot, but so far it looks like i was being overly cautious. Probably cant play some games with anti-cheat right now… but i so rarely play those types of game.