I shift like I have ADHD and break rear shift cable strands within 2500 miles so I proactively replace them every 2000 miles. With housing going high friction in less than two cables I swap it at the same time.

Conversely, I get at least 8000 miles out of Cinelli cork tape before it tears.

So I save time and money only unwrapping to just past the shifter then rewrapping after I've installed new housing.