Has it really been that long? Apparently so. Valve originally announced their rebranding of Steam Play with Proton back on August 21st, 2018. Seems like a good time for a quick reflection being halfway to a decade old now with the tech that gave rise to the Steam Deck.
Proton is one of the best things ever, I’ve tried many games and pretty much all of them worked without any major issues. A few of them I had to reconfigure settings but the majority of them just worked.
Without proton my gaming experience would be much more limited (a lot of the games I play do have Linux versions, but not all of them, especially Journey and RainWorld).