> Requiring a fork to open pull requests as an outsider to a project is in itself a idiosyncrasy of GitHub that could be done without. Gitea and Forgejo for example support AGit: https://forgejo.org/docs/latest/user/agit-support/.

Ah yes, I'm sure the remote being called "origin" is what confuses people when they have to push to a refspec with push options. That's so much more straightforward than a button "create pull request".