A total rewrite is almost never worth it unless the thing you are rewriting is not under development in-production. eg. you don't have to fix bugs in the old ve

A total rewrite is almost never worth it unless the thing you are rewriting is not under development in-production. eg. you don't have to fix bugs in the old version during the rewrite. As you will have a very clear specification and domain experience (if you also worked on the original).