Here is what email patches are all about:

https://blog.ffwll.ch/2017/08/github-why-cant-host-the-kerne...

I tried email patches with another person myself. The only reason GH won here, is because the git people made one fatal mistake: They forgot to include the tree hash and only show the commit hash in the email patch. But the commit hash is useless. When you email patch, then commits people want to treat as "the same" and talk about have different hashes. The commit times differ and there is not only the commit author, but also the committer.

We stopped doing email patches, because commit hashes became useless for communicating with each other.

GitHub made commit hashes "constant" in a way people care about.

For our purposes, tree hashes would have been much better in practice.

The git user interface is literally "git porcelain". It cuts you for no reason.