It is, but you are not really locked in it
Steam/Proton/Gamescope work outside of steamOS. Valve contributes to open source software, including linux amd drivers, that can easily be used outside of steamOS
OpenSUSE is corporate- driven
No all default, maybe it’s just dumb chrome which doesn’t detect themes on Linux, try firefox
5.27.6
Also it would sacrifice user experience over “security” - i.e. with default SElinux config proton may not work correctly - see this bug
Can confirm that now it is visible in kbin
I haven’t experienced this bug for like half a year
Can’t unsee it now
Not incredibly difficult, it just requires 5 min setup, and creating your add-on collection