[hnjst]

I'll take an intermediary position. Commits on a WiP branch don't need to let the repo in a working state, however I like when said branch has its history rewritten so that each commit is mostly a working unit change before submitting the branch for merging.

You definitely shouldn't restrain from committing often during development, however having a cherrypickable branch history when merging instead of "let's squash this mess and forget about it" has value to me.