zlacker

My experience is that you should always aim for frequent small commits. This is what continuous integration and trunk-based development advocate and it saves a lot of headaches and the need to come up with "exotic" solutions to problems created by big, long-lived dev branches.

This is quite orthogonal to developing parts serially or not, and it is perfectly fine to change or refactor ealier parts when you work on later parts. Development is an iterative process.

It seems to me that "stacked diffs" are an example of looking for a technical solution to process issue.