Pure anecdote so I know it is meaningless but I have rewritten/refactored old services with new code, or even new languages twice with little problem because th

Pure anecdote so I know it is meaningless but I have rewritten/refactored old services with new code, or even new languages twice with little problem because the interface was well defined. We had hundreds of devs working in other areas and we were all on different release cycles because changes were easy and decoupled. We let any team submit bug reports when we either weren't complying with our interface or we had a bug somewhere. The only teams I had to spend time on were the ones which were on a common DB before we moved off of it.