My "guess" is 5-7 years out DVC stops ROFR on the 2042 resorts and also no longer allows transfer of points for these resorts, and limits reservations to your home resort only. That way DVC can maintain pricing on any new or newer resorts.
I don't have a copy of the contract yet, but would Disney be allowed to keep members from reserving at resorts other than their home one under the agreement? I can see cutting out perks, but that doesn't seem like a perk. It seems basic to the system.
My own take on it is that Disney won't do anything that would make current buyers think twice about buying in.
...and limits reservations to your home resort only.
I thought we'd cleared this up.
On Jan 31 2042 the appropriate DVC resorts will spontaneously burst into flames and burn to the ground. I just hope I'm there to see it.