The classic email workflow is either one patch or a patch series. Where each patch becomes a commit. And each patch can be reviewed in isolation (like a commit).
There’s nothing stopping anyone from creating a PR series. My reasoning for the squash workflow is described here[0]. I just equate a PR to a patch. And it becomes a commit in the main branch. I don’t really care about the commits in the PR, just like no one cares about the commits that produced the patch in the email workflow.
> Presumably you don’t mean “they don’t care about the commit that produced the patch”… since the patch is just a transport format for the commit.
Commits. Not everyone will care to clean up their local history just to produce a single patch. You can git diff it out.
EDIT:
I was using "patch" for diff so scratch the above comment. Even then, when using a forge, I'd rather use squash unless everyone clean up their commit history when producing a PR.
[0]: https://news.ycombinator.com/item?id=41839282