Thank you. Super helpful information. And for those not familiar (I had to look it up), "moisture regain" is defined as: "The weight of moisture on a textile given as a percentage of the oven-dry weight." Given how little down weighs, that is not much moisture retention.
A big take away here seems to be that the Encapsil process (or at least a Silicon-based plasma process) is superior to the alternative coating processes, which is good to know. But it also sounds like then Patagonia might have a monopoly here and plan on extracting monopoly rents for awhile. I did a quick patent search, but lacked the right key words to find anything useful.
Alternative might be for Patagonia to license the technology to other manufacturers, which will still make it more expensive, but probably less than if Patagonia tries to keep it exclusive. Given that Patagonia does not currently make sleeping bags (unless I am forgetting something...although maybe that is their plan now), it will probably have to wait for patents to run out before the price really comes down. Depending on what the key patents are, this could take some time.