I think it really depends on the leadership. The worse case scenario is when the scenario you given: the "pet project," where a team goes nuts on a codebase th

I think it really depends on the leadership. The worse case scenario is when the scenario you given: the "pet project," where a team goes nuts on a codebase they aren't maintaining, in which case it's effectively out-sourcing maintenance and tech debt. Ideally, the home team leadership has a lot of leverage to push back on work by the away team, which means away team work is slow but at least it gets done.