I think one of the main reasons the game crashes so much on Linux is because of directX and proton having to do so much on the fly to translate everything to Vulkan with DXVK. We are going to be playing this game for the next 10 years probably so why not just bite the bullet now get the Vulkan stuff out of the way and have a game that wont crash constantly for the foreseeable future? seems like a no brainer to me.
My game does not crash (at least, not more than on windows - so very rarely)