@cameronbosch @killyourfm What I did a few years ago is writing a script to plot progress in gaming via Proton from the official ProtonDB data that was put upstream openly on Github.
https://gitlab.com/TheJackiMonster/protondb-evalute
You can see from about 45% being playable in a decent way in 2019, we have come to around 73% of Windows games being playable now (in about 6 years).
I'm looking forward to the next 6 years if that's the speed we're going.