Which is ironic because PR is definitely alien to git. There is no such git concept as a PR, nor git pr command.

Coming from a pure git workflow in mailing lists where branches, and commits(and associated diff and git am metadata) are the unit of work, I struggled to adapt into the PR concept in the beginning.

I liked to work with gerrit, where the unit of the review is the commit. This also ensured a nice little history and curation of the change set. The commit in github is not even in the main tab of the PR. It is like it is a second thought. Even in the review, reviewing by commit is awkward and discouraged.