Old Campy DT shift cables were heavier than other brands so they wouldn't break. Mine never did and were still in good condition when I had to replace them with modern, longer shift cables to accommodate my handlebar-mounted Kelly Take-Offs.

Brake cables? Originals that came with Modolo Pros purchased in the early 1980s still in service. Recently inspected with no evidence of fraying or fatigue. They made stuff to last a Pro's daily abuse, so they can easily withstand a club rider's use for many years.