With Github so popular now, not everyone is aware of the workflows that git provides out-of-the-box for collaboration. Thought this may pique some people’s curiosity :)
Now? Lol
Have you tried it at all? Email workflow is pleasant even with the unpolished email tools out there. If someone had invested in those tools then the github type workflow wouldn’t have become popular.
I was laughing at the usage of the OP saying “now that GitHub is so popular”. Like… GitHub has been the most popular git hosting service since only a couple of years after it came out back in 2008.
And to answer your question: Yes, I use GitHub.
I love the email workflow: open GNUS, hit C-o on the email, and boom i have a buffer holding a patch that can be applied with git am!