Of the top 1000 games on Steam, only 38 currently don’t run at all and 744 of those are Gold or Platinum status on ProtonDB. Having nearly 3/4 of the top 1000 games work flawlessly or nearly so is enough to not need Windows.
If for some reason it’s not, you could dual boot, but I haven’t run into a game in months I could not play.
Of the top 1000 games on Steam, only 38 currently don’t run at all and 744 of those are Gold or Platinum status on ProtonDB. Having nearly 3/4 of the top 1000 games work flawlessly or nearly so is enough to not need Windows.
If for some reason it’s not, you could dual boot, but I haven’t run into a game in months I could not play.