I'll have to give those a shot and see if they work on games not running in Proton. My criticism is a bit dated to the last time I did this assessment for the purposes of discussion. Thanks for the callout!
gallium-nine can't really be targetted however. While most distribution with AMD or Intel graphics will have it enabled as part of Mesa, it can't be used for nvidia (unless... well, you could theoretically use zink to run that on top of vulkan as well). It's DX9 in any case.
Winelib has been a thing for a veeery long time, I think it was always possible to build a native executable and link against Wine's DX->OGL translation layer.
If you wanted to try out out, Nobarra, a Fedora based distro which has been tweaked for gaming. It’s done by the person who does the glorious egg roll Proton version.
