Right now, the 2042 end date only matters if you are thinking of
DVC as a financial investment, rather than a pre-paid vacation plan. (Of course, at some point, the end date will become close enough so that the value of DVC will be less than "paying as you go". That's when Disney will definitely have to do something!. I think we have quite a few years left before that will be a problem - maybe as many as 15 - 20, depending on individual vacation patterns).
In our case, we knew we would be spending xxx dollars annually on a Disney vacation. DVC turned out to be a less expensive option than "paying as we go", AND we got to stay in much bigger and nicer accomodations. Even if we don't get anything back from our initial purchase (if we ever decide to sell), we'll still be ahead. Our "break even" period was much less than the time reamining before the end of DVC.
IMHO, no timeshare is a good financial investment. At best, a timeshare purchase is very risky if you are doing it to make money. I do not think it is realistic to expect to get your initial purchase price back, let alone see it increase. I know that some DVC members who bought in during the early 90's did get their initial purchase price (and then some) when they sold. Again, IMHO, this is really a rare case and except for DVC and maybe a very few others, it just doesn't happen. The fact that DVC has increased in value so far is a BIG plus is a credit to both the product and Disney's ability to attract buyers. Those buying in now should NOT expect to "recover their investment" later on.
JMHO. YMMV.