stacked diffs are the best approach and working at a company that uses them and reading about the "pull request" workflow that everyone else subjects themselves to makes me wonder why everyone is not using stacked diffs instead of repeating this "squash vs. not squash" debate eternally.

every commit is reviewed individually. every commit must have a meaningful message, no "wip fix whatever" nonsense. every commit must pass CI. every commit is pushed to master in order.