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.
This is very out of date. The new game porting toolkit makes it trivial to play most windows games.
Kind of. Its more aimed at developers to “port” the game rather than the end user. Saying that there will no doubt be a third party solution.