What are these people talking about? What's the difference between "stacked diffs" and just adding commits to a branch? Who cares if the branch is called "master" or not? You could also force push updated commits (e.g. after fixup and rebase etc) and tools like Gitlab and GitHub can show you the diff between versions (or "changesets", as they call them). Gitlab at least makes it pretty clear when a change has been made and the order things were done in. Pretty sure GitHub does too.
