Comment by red-iron-pine 2 days ago
WINE crawled so that Proton could run.
Like even in 2014 WINE worked well enough for most games for me. Proton just made it utterly effortless, and lets me run AAA games like RDR2 and CP2077.
Proton is amazing and it's really three different subprojects that deserve a lot of credit each.
First is Wine itself, with its implementation of Win32 APIs. I ran some games through Wine even twenty years ago but it was certainly not always possible, and usually not even easy.
Second is DXVK, which fills the main gap of Wine, namely Direct3D compatibility. Wine has long had its own implementation of D3D libraries, but it was not as performant, and more importantly it was never quite complete. You'd run into all sorts of problems because the Wine implementation differed from the Windows native D3D, and that was enough to break many gams. DXVK is a translation layer that translates D3D calls to Vulkan with excellent performance, and basically solves the problem of D3D on Linux.
Then there's the parts original to Proton itself. It applies targeted, high quality patches to Wine and DXVK to improve game compatibility, brings in a few other modules, and most importantly Proton glues it all together so it works seamlessly and with excellent UX. From the first release of Proton until recently, running Windows games through Steam took just a couple extra clicks to enable Proton for that game. And now even that isn't necessary, Proton is enabled by default so you run a game just by downloading it and launching, same exact process as on Windows.
I would say that WINE did 90% of what had to be done, then Proton came and did another 90% so now we are 99% there.