I am not sure about tangled.sh, I might ask them in their discord about this now y'know.
The Linux kernel developers have been using that workflow for a lot of time. Maybe still now.
[1] https://git-scm.com/docs/git-format-patch
[2] https://git-scm.com/docs/git-send-email
[3] https://git-scm.com/docs/git-am
Yes, they do. Git itself is also developed that way.
Btw, you don't need to use format + send-email, send-email calls format-patch under the hood
What features do you feel like git is missing?
Why?
I am not sure about tangled.sh, I might ask them in their discord about this now y'know.