far too often I have found rewrites, which in many cases involve moving to new hardware and possibly OS, tend to drag on because those involved do not know all

far too often I have found rewrites, which in many cases involve moving to new hardware and possibly OS, tend to drag on because those involved do not know all the touch points of the current systems and also fail to properly count the investment other teams have in making connections to the original systems. I have even seen them done to bypass a management/development team that was in disfavor with the company leadership. In effect, put together a new platform with new leadership.