I think it is conceptually the same but multiple PRs gives you the tools to manage the commits properly which GitHub is missing. You can't do the equivalent of

I think it is conceptually the same but multiple PRs gives you the tools to manage the commits properly which GitHub is missing. You can't do the equivalent of `git rebase -i` in the GitHub UI to squash a fixup into a previous commit. Having each change in it's own PR enables that workflow using the existing GitHub UI.