@abcdw @civodul @khinsen That's not our experience. Though, of course, if you start contributing a lot to GNOME, you can ask to get an LDAP account, and then you get single-sign-on for all GNOME services.
If you're referring to being able to send patches via email, that's just false economy: you have a steep set up cost (git send-email is not a simple thing), and then you get stuck with patches over email, which is a fate worse than death.