> With my team, once you are done with your PR, you do a quick rebase pass over your branch and squash any remaining partial/in progress/fixup commits into a fi

> With my team, once you are done with your PR, you do a quick rebase pass over your branch and squash any remaining partial/in progress/fixup commits into a final set of meaningful logical commits - this set gets merged ... A lack of this simple discipline is what causes people to push for squashing. If you squash every PR then your commits may be too coarse, but you don't end up with random "fix tests" commits everywhere. If it's not part of your company culture to do the cleanup then it's harder to get that rolling than to just impose a repo rule that only squash merges are allowed in.