Many games are still not functional on Linux. Here is a link showing which ones aren't just due to their anti-cheat features. That doesn't include games that aren't compatible for other reasons.

https://areweanticheatyet.com/

i made the switch to linux about 2 years ago(2024,stopped dual booting on dec 2024), so far it has been ok (except for one hiccup where My TF2'S fps would tank but there is a workaround, i use Nvidia),apps are okay but i hate how basically the only option you have is GIMP, which i dont like how it doesnt have Content-Aware Scaling i think its called?,shapes would be nice too but its optional, i just use photopeas for the time being)
and video games:
i mainly avoid kernel level anticheat things so its really good here.
Proton/DXVK is very good and nice,but it would be nice if game devs made native Linux versions.
and GNOME 49 looks really nice i love the UI/UX,CachyOS is also a nice Distro(i did try Arch but mehh probably not for me i did install the de and utils but disk stuff was annoying),BTRFS is really handy and nice(i love snapshots).
devices i run desktop Linux on:
I3 12100F + GTX 1650 + 16GB RAM (gaming pc)
Raspberry pi 5 8GB ram (backup/home server pc, running debian/armbian with ext4 on this though)