I'm older than the web. I worked on projects using CVS, SVN, mercurial, git-and-email, git-with-shared-repository, and git-with-forges. I'll take forges every time, and it isn't even close. It's not a matter of not having done it the old way, it's a matter of not wanting to do it again.
What I like about git-and-email-patches is the barrier to entry.
I think it's dwm that explicitly advertises a small and elitist userbase as a feature/design goal. I feel like mailing lists as a workflow serve a similar purpose, even if unintentionally.
With the advent of AI slop as pull request I think I'm gravitating to platforms with a higher barrier to entry, not lower.