Right, well, for me I ditched Windows entirely because every serious development workflow is way more involved and complex, performance is really poor, random weird bugs after mandated updates, and so on. The cherry on top is all of Valve and the open source folks work on Proton and gaming on Linux in general.
All good and dandy, except Valve's failure to have studios target Linux, including games that already make use of compatible APIs, like those using Android NDK.
Thus Proton depends on Windows as source ecosystem, only yet another platform to "emulate" on Linux, like MAME, Amiga, Playstation, whatever.