baslas

My own experience is that most of the times people view this subject as a matter of personal preference. They do not see this as a technical choice that may (or not) solve problems or help reach particular goals. Thus, when discussing this subject from a logical/engineering perspective, laying down pros/cons arguments, the other party may take it personally.

I have never used this tool but Google open-sourced Copybara[1]. If you look at the commits of their other open-source repositories, it seems this tool is often used.

[1] https://github.com/google/copybara