How many times do you think a developer or development team has looked at some legacy or technical debt-laden software and exclaimed “this bollocks needs a complete rewrite!”? How many times do you think that same “complete rewrite” has led to disaster taking three, four, or more multiples of time than originally anticipated? I’d bet money on most. I’ve seen it happen. I’ve been in and led teams where it’s happened. It sucks for everyone involved.