Currently, 27 years after opening, only around 25% of the OKW contracts have been resold. The vast majority of members have kept their contracts since they've bought them. On average, 1% of total
DVC contracts at each resort have been resold each year. There were some statistics posted here on the DIS from data taken from the OC Comptroller website.
It is possible that the average of 10 years is correct for other timeshares, but it's not true for DVC.
People buying 2042 resorts right now are buying contracts with less time remaining than the average time a member keeps his contracts.