Also some FOSS projects and some content creators use it to spread announcement
And NASA posts a lot of astronomy pictures with #astromigration
Some of the “popular twitterers” are also on Mastodon, like @georgetakei@universeodon.com , @stephenfry@mastodonapp.uk (less activity), @neilhimself@mastodon.social
Like taiyang said, SteamOS is based on Arch which is super not newbie friendly, but the desktop modes “desktop environment” is KDE which available on pretty much any Linux distro, including beginner friendly ones like (K)Ubuntu and Fedora (although I’m not sure how beginner friendly Fedora is, regarding proprietary drivers and codecs)