If you are asking me if I’ve experienced a successful rewrite? Yes, numerous, and the more successful ones have happened as a result of planning. I’ve also be

If you are asking me if I’ve experienced a successful rewrite? Yes, numerous, and the more successful ones have happened as a result of planning. I’ve also been part of rewrites that have gone poorly, due to a lack of planning, where the legacy software fails in unexpected and unanticipated ways, which requires a rushed attempt to fix the issue (which fails) and a subsequent rushed attempt to replace the core functionality when the fix doesn’t work (and also fails because “core” tends to be larger than you initially think). Knowing ahead of time when software isn’t going to be useful any more isn’t really an option, it’s just an acceptance of what is already going to happen.