because Linux tends to run games through (time to piss more people off) an emulator like Wine/Proton

It’s not that this will piss people off, it’s that it’s factually inaccurate. Wine Is Not (an) Emulator. It’s right there in the name. It’s a compatibility layer. You aren’t emulating Windows.

(But this nitpicking doesn’t have any impact on your point overall regarding shader pre-caching.)