I've been playing LoL since a long time - practically since my friends etc. started it in 2009. I was on windows back then and moved slowly and slowly to Linux via dual boot. These days I only used windows for gaming and Linux (Ubuntu) for everything else.
While back then, stuff like FLOSS and co. wasn't that important to me - these days I appreciate it much more - and I like to have a computer which just doesn't annoy me with bloat and doesn't do stuff I don't want it to do.
After hearing about the steam deck stuff recently I gave gaming on Linux a try. I just follow the few simple steps outlined in online guides. It was pretty easy to install steam and league of legends. I even played a few very old games on steam - games which I didn't play all the time because I wouldn't boot up windows just for them.
I did decrease the LoL graphics a bit - as my laptop is a bit older. But seriously... League of Legends was working! It was working flawlessly! π€© I didn't see any crashes or stuff like that. I played a few games and realised, that I really didn't need to go back to windows anymore.
I'm migrating to a new laptop with better specs soon - and It'll be my first laptop in 1.5 decades that will not have dual boot. π If I ever need windows again I'll either use the dual boot on my old laptop or simply run a VM for such rare cases. But even things like MS Teams work in the browser, so no need for Windows unless it's MS Office - which I never needed yet.
Just wanted to share my recent personal experience π
Productivity in general is the only reason to still use Windows. Office is a big one (though great alternatives like LO and OnlyOffice exist), but also Adobe products, pro audio software, etc.
I'd have to say OnlyOffice is starting to replace LibreOffice for me. Its a much nicer experience, and the UI is more like Office.