This is why I always ask "Is this going to leave our code in a better or worse position if we abandon yhis half way through". If the answer is "worse" then don'

This is why I always ask "Is this going to leave our code in a better or worse position if we abandon yhis half way through". If the answer is "worse" then don't start it. Not unless you can get the entire thing done in about a week. If it takes a quarter, the probability of reprioritization is way too high.