How to use multiple Proton shader caches
I tried to specify a different cache location, but all it did was generate the cache at the default location and wiping anything that was already cached, and trying to read from my location which fails since that's not where it cached it.

I understand why it only keeps the cache from a single game, since it can take up space, but i got 20TB of storage, im good spending a few hundred GB on shader caches. Some games takes 2 seconds to cache shaders while others takes several hours (ff14 takes 3 hours).