No. Just heavy and expensive. You indicated you wanted to sail in the Keys and thought $1000 for 200 feet of chain was expensive. I was just pointing out that you don't need that kind of length most places you go. The Caribbean is different. The volcanic nature of those islands means deeper water near shore.
There is such a thing as too much chain (size, weight) which may hinder an anchor from setting.
It would hinder the anchor from setting only because it wouldn't allow the boat to move.
Line has some elasticity and absorbs shock where chain will transmit the full force to your cleat.
The cantenary curve of a good chain will absorb the shock of a lifting wave and the sheer weight will hold the boat steady against a chop. I'm unfamiliar with the transfer of shock from the anchor. I assume the bottom stays steady and there are no giant wahoo or grouper trying to yank the anchor around.
The difference between anchoring with rope rode and chain is that the weight of the chain acts like a meta-kellet and pulls the boat forward against the wind/current and a curve develops in the line. That curve encourages a better angle on the anchor which means less scope is necessary. 3:1 up to 5:1 is typical. A mostly rope rode means around 7:1. The more lead chain, the more it will affect like all chain, so one can "get away" with scope as short as 5:1 if half of it is chain. Keep in mind, the shallower your anchor depth, the less chain weight there is to help create that cantenary curve. More scope in shallow water, for chain, is a good idea.
The cantenary curve also takes up the shock of waves lifting and dropping the boat. If you have 3:1 scope out in 20 feet of water, that's 69 feet of chain (20' + 3' of freeboard). In 20 feet, I think 3:1 its pretty skimpy for both, the reason stated above, and that if a 6 foot wave came along, you will be in 23 feet of water at the top of that wave. That means your 3:1 scope is temporarily only 2.65:1. So, let a little more out.
I toured the Galapagos aboard an 80'+ tour boat once. They had all chain rode out and while anchored in a cove. One of the deckhands and I were snorkeling when he challenged me to swim to the bottom. We couldn't see it because of the particulates. I took him up on it and pulled myself down the anchor chain. In the beginning, it was straight down and I was constantly clearing my ears. Soon, however, the chain was more like a 45 degree angle and then it was much more straight out than straight down. I was starting to worry that I wouldn't reach the bottom because the anchor chain wasn't going to lead me there fast enough. Finally, I saw the bottom and left the chain to swim directly down. The captain told me they were anchored in 55 feet of water. There was a lot more horizontal length to the anchor chain, in that 55 feet of depth, than vertical length. Usually, a good 10% or more of chain is just laying on the bottom. That is shock absorbing weight the boat has to pickup off the bottom and stretch out nearly straight before it feels the tension on the anchor as a hard jerk. Perhaps for smaller lighter boats with light weight chain, that would be the case.
-Will (Dragonfly)