We are not talking about just a few games as in the pre-steam days, but ~30% of all games on steam have native ports for linux now and over 70% can be played with proton by now.

And in the end you will always have to make a choice what games to play, since not everyone owns every console ever (which have exclusive titles) or the latest and greatest hardware to play the very latest AAA titles (quite a few of which have native linux ports by now)

Out of curiosity I've installed Steam and checked featured game. Linux version has not started (not Ubuntu here) but Proton version worked.

Now if Steam had productivity applications [1] and they had Proton version (not yet).

[1] https://store.steampowered.com/software/

[2] https://www.protondb.com/

Pretty much every Steam game except multiplayer focused games works in Linux now.

It's a high enough percentage that I don't really consider what OS it was built for before buying almost any game.