Indeed your side note should be the first point. I see that very often in practice. As a result, products get rewritten all the time because developers dont wa

Indeed your side note should be the first point. I see that very often in practice. As a result, products get rewritten all the time because developers dont want to spend time understanding the current system believing they can do better job than the previous one. They will create different problems. And the cycle repeats. The not-invented-here (or by-me) syndrome is probably also at play here.