That's not what I was referring to. F.e. management brought on the project some senior dev. He did a minor framework update, reeplace one library with another e

That's not what I was referring to. F.e. management brought on the project some senior dev. He did a minor framework update, reeplace one library with another even if nobody was complaining about anything and he was gone. None of the problems or technical debt the client was actually complaining was addressed. Oh, and he did some implementation that blocked the other devs, and we needed to work arround it.