Nixy is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
@Maltimore
To be fair the bubble of people who give a crap about source control at all is very small as well.
Looking at Gitlab's Grafana instance there actually has been a huge exodus.
The question is really whether repos with large established communities that have based themselves in GitHub will move (I'm looking at you Nix)
