This is very important. When you're developing a large monorepo like Google3 you frequently get large scale changes from engineers outside your team, doing exac

This is very important. When you're developing a large monorepo like Google3 you frequently get large scale changes from engineers outside your team, doing exactly these kinds of large scale reactors. It puts the onus of fixing things on the people making changes in the widely used libraries rather than separately on all the individual library users, which is great. It's way more efficient to have one person who knows exactly what's changing go fix it everywhere than require dozens or more separate engineers to have to investigate some new incompatibility and then potentially resolve it in sub-optimal ways.