Depends on your cruising ground
We have a bruce and a danforth with 15 feet of chain, 150-200 feet of 3/8's nylon for cruising on Lake Erie.The bottom is usually clay or sand, and we have always found an anchorage with good holding at depths from 5 to 15 feet. We have never found (or heard of) obstructions on the bottom in an anchorage. Finally, since most Lake Erie boaters find a marina for overnight stays, we have never been in a crowded place where we couldn't easily use a 7:1 scope to get excellent holding with a nylon rode. With enough scope, nylon will hold as well as chain, and its natural stretch cushions motion in the waves. Finally, the nylon is much lighter than the chain, an important issue whether you store it at the bow (where weight adds to pitching) or like I do, in the cabin, (whence I carry it to the bow for deployment.)Chain offers several key advantages:- Chain is more durable against cutting, or chaffing. It's a necessity if you are anchoring in coral, or other sharp obstacles on the bottom.- Chain allows less scope (5:1 equivalent to 7:1 for rope) in a crowded anchorage.- Chain will self-flake into a chain locker, while rope requires careful coiling to run free at the next anchorage.Like almost every sailing decision, you pays yer money, and you takes yer choice!DavidLady Lillie'77 h27