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.
You’re correct in giving WINE the credit it’s due.
But I couldn’t disagree more with the “gaming with WINE was not that bad” statement.
It was horrible. Game updates broke compatibility a thousand times, outdated Wine wrappers were a mess, setting up most games involved convoluted scripts, and even when things magically just worked performance was usually lower (except for some specific CPU bound games).