How much is the speed drop from translation using Proton? Is it so big or just small? Hows the performance of cartoonish Windows only games? And whats your hardware and how much is the price? I’m sorry but I cannot test it myself because I’m still on my mobile. Can you also tell about how many games are compatible with Proton? What about non-popular games?
To elaborate on why the GE is relevant. (as comment for OP, i’m sure you know it already)
GE is a special fork of proton that comes with lots of fixes and improvements. Sometimes a games cutscenes won’t work on proton, but they will on proton GE (because of H.264 codec crap).