1. There is absolutely no shortage of emulators. Pretty well every good emulator has a Linux version. Some emulators (xemu, dolphin) even run better 2. PC gaming is still not 100% flawless but more things work than don't. Ever since the Steam Deck it's been a whole new world for gaming on Linux.

(Basically if a game works on the Steam Deck, it'll work on regular Steam in Linux)