This is no different from saying "monorepo bad". Aside from performance issues in git, why would a monorepo be bad? It seems very natural to me to have a whole

This is no different from saying "monorepo bad". Aside from performance issues in git, why would a monorepo be bad? It seems very natural to me to have a whole system referenced with a single branch/tag that must all pass CI together. Otherwise supporting projects can introduce breaking changes downstream that are not apparent before they hit master.