You don't need Steam OS, any major Linux distro will suffice, as the customizations are not really on OS level, but on the Steam application level. And also, yo

You don't need Steam OS, any major Linux distro will suffice, as the customizations are not really on OS level, but on the Steam application level. And also, you don't strictly need Steam either, because the Heroic launcher can also do the "just select a Proton / Wine version and run Win application" functionality. Also, Win 10 LTSC is still supported until like 2032 or so. I love it because it's more bare, and LTSCs don't get functional updates. Just install, point the thing toward an activation server / massgrave it, and you are good to go for many years.