Not just an aging population, but also a
larger one.
At any given time, there is some probability that any particular owner wants to well. "Aging out" of the product is only one of those reasons. Moving across the country, getting a divorce, needing to care for a loved one long term, etc. etc. etc. These things all happen regularly.
But, the ownership base is larger every year. Is the demand for resale contracts also growing every year? It may have been, because the broker ecosystem has been advertising like mad to grow the population of "I might buy a resale
DVC". Does that growth keep up with the growth in ownership base?
Eventually, it won't. When that happens, the resale market will feel it. There is still a vibrant rental ecosystem which will support prices beyond organic demand, but if Disney takes some of the steps that e.g. Wyndham has, that can dry up quickly.