How much valve did port in plain and simple wine C code that horrible c++ diarrhea dxvk code in this wine version?

Why is valve not porting that much proton vkd3d code into wine vkd3d code?

Explain.

That said, there is still a legal issue: somebody has to take over the legal requirement of the technical support of 'proton' titles where real money is put into (sales or micro-transactions). Valve or the game devs have to support this technical hell hole which is elf/linux+proton debugging (microsoft/apple grade).