That’s one hell of a number of games.
Proton has been receiving many updates in the past few months as well, with the introduction of the Soldier Linux runtime container and Proton Experimental on top of the regular Proton releases. We are still getting about 100 new titles working flawlessly (according to user reports) on a monthly basis, which is a very healthy and steady growth. Another point is the percentage of Windows games working out of the box in Proton over time. The number has been close to 50% since for a long time and seems to be fairly stable.
Proton is one of the biggest things to happen to desktop Linux in over a decade – or more.