A few times in my career I have been in situation where decision to rewrite was made. Worst case was where decision was made, resources had been invested and t

A few times in my career I have been in situation where decision to rewrite was made. Worst case was where decision was made, resources had been invested and then it was an ongoing theme for years to come (this particular company I have in mind is still talking about next version 6 years after initial resources were invested, I was the one to build foundation system which works to date even though I left 4 years ago) Best case was in the company I was contracting for, they had huge and almost 20 years old pearl codebase which they decided to replace with python ecosystem. In 6 months the company was already actively switching to the new system, exposing bugs early etc. In my view each time management is where it can result in good or bad outcome.