My repo uses my personal git server as primary, github as a mirror: https://gitworkshop.dev/repo/sentrum

If people mainly use GH for the social aspect and we can steal that with nip34, I believe people will naturally use other git servers since they won't depend on GH so much anymore. 

 There are a bunch of projects that use GH for PRs and Issues and have created a nip34 repo event. eg gossip, amber, amethyst, ndk...