Sounds like it — it was posted by The Elder Scrolls Online, not Valve. (Edit: Yes, of course this still means Proton.)
I guess they just don’t want to bother with it any more?
That could be sweet. Of course, they’ve already tried that, but SteamOS wasn’t really ready then.
And I suppose anyone can get a random mini PC and install Steam on it…
I’ll have to check it out then.
Wired and wireless X-Box 360 controllers with the built-in kernel drivers, generally hassle-free these days!