Except that AMD doesn't have feature parity with Windows driver on open source version and has all the Nvidia driver headaches on closed source version.
They are not behind their windows driver on OpenGL. And neither for Vulkan, I think. AMDVLK scores a few wins here and there, but RADV is generally more stable, performant, and compatible. Plus being open-source, it is easily extended, like valve is doing with their AC0 experiment [1].
Last I heard, people were installing Linux to use the AMD OpenGL drivers to play emulators (it might have been Cemu, actually ran trough wine).
It doesn’t have “all” the headaches on the closed source version, afaik - it still implements the standard APIs and thus works with systems that were designed to work with every other driver from AMD to Mali, unlike the nVidia proprietary driver.
I'm not sure what AMD really managed here.