The nice thing with chain is that the rode *itself* is dead weight. You
can use less scope with an all chain rode than with a mixed or pure
nylon rode.

chain don't stretch, and when the winds pull the chain more or less tight,

Which won't happen, unless A) you don't have enough scope or B) there is
a _lot_ of freakin' wind.

Do you have /any/ idea how much wind force would be required to pull any
appropriate scope of chain *straight*??

wind
gusts can and do put HUGE loads on the anchor system, and jerking from wave
actions as put orders of magnitude more load on the system.

Like I said, NObody chains a boat to a dock or rock on shore.

Why are you comparing an anchor to a dock or rock on shore?

Why would anyone
think they can chain a boat to a rock under the water?

Why are you comparing an anchor to a rock under the water?

ans: they don't think
so. they KNOW the anchor will drag.

Drag, probably not. Reset, yes. An anchor isn't this immovable object
you seem to think it is.

they are just too lazy to use anything
but all chain in their electric windlass.

It's not a matter of laziness. All chain has several advantages over all
nylon, not the least of which is chafe resistance and weight.


20 knots is not "a blow", especially not if you are behind any kind of
protection in terms of where you are anchoring (e.g. behind a barrier
island, in some kind of protected waterway, etc.)

Those are reasonably stiff operational conditions around here, but are
definitely not "a blow".

I've been out in 20 knot winds (not by choice), but I sure wouldn't want
to anchor in them!


--
~/Garth - 1966 Glastron V-142 Skiflite: "Blue-Boat"
"There is nothing - absolutely nothing - half so much worth doing
as simply messing about in boats."
-Kenneth Grahame, The Wind in the Willows