@gamingonlinux *2012 (2013 was "stable" release). I''m not sure when the headless version was available for linux though, I know it was well before the graphical client though, so maybe that's what they mean?

It didn't have steam play at that time either though so their claim is doubly weird, the original linux client only supported linux-native games, wouldn't even let you download windows games at that point, biggest ask was for them to allow us to download at least so we could use WINE.