Don’t forget the chain is there to stop chaff on rocky bottom your weighted line will suffer in most conditions if not all!
Very true. The chain (or weighted portion of the line in the other case) should lie at least in part on the seabed, and will be repeatedly lifted and dropped as the swell raises and tugs at the hull. In any kind of hard uneven substrate, the line will be abraded against any rocks/outctcroppings, and will be made worse in shifting winds as the pull goes side to side. This will wear a nylon line fairly quickly.