> I know a lot of people want to maintain the history of each PR, but you won't need it in your VCS.

Having worked on a maintenance team for years, this is just wrong. You don't know what someone will or won't need in the future. Those individual commits have had extra context that have been a massive help for me all sorts of times.

I'm fine with manually squashing individual "fix typo"-style commits, but just squashing the entire branch removes too much.