As a big Linux fan, it makes me said that Wine needs to exist. But, maybe it’s not such a bad thing. Linux is just a kernel, with no associated libraries for app developers. App devs don’t want to manually write system calls, so it’s always been the case thar they lick and choose which set of libraries to target for their Linux apps. A popular low level choice is the GNU standard C library, and a popular high level choice is the GTK/GDK/Gnome stack. But these aren’t the only choices. I mean you can use the MUSL standard C library if you want. You can choose between OpenGL, Vulkan, and WGPU for graphics already.
I see Wine and Proton as just being another set of standard apis to target. Maybe they don’t have the best design, but is traditional Unix really the best design either? Now the Valve and company are supporting Wine, it’s one of the Linux targets with the most actual developers. And of course it has a huge advantage over the glibc + Vulkan stuff: it retains binary compatibility forever.