The inability to use all of our points the last couple of years assumes that all points will still be owned and in active use come 2041.
Currently, there are members who don't use all their points and let them simply go to waste. Occasionlly on here, we hear of a user who let 5 points go to waste etc. There have also been posts where people encountered other users (non-disboard members) who regularly let points go to waste. They have 300 points, the trip this year only took 230, they let 70 go to waste, they don't "bother" with banking and borrowing etc. DVC has never stated how many points go to waste each year, my bet is that it is a bit larger than most of us think and in a sense it does help the rest of us get the reservations that we want.
The other thing that is happening at this time is folks who default on their membership. If you don't pay your maintanence fees, Disney can reposses your points. I am sure that this happenes today, it happens with all timeshares. It probably happens less at DVC because it is easy enough to sell a contract if you are unable to pay fees or no longer interested. But there will always be those who just stop paying. Today DVC is able to reclaim and resell the points. Again, they don't report how much of this is taking place.
But defaulted points should become a much bigger deal as we get close to the end. The points won't be worth as much on the resale market because of the very short amount of time left for DVC. Also a lot of points are going to be owned by very elderly individuals who will find themselves unable to pay the fees. In some cases other family members may step in and pay the fees but in many cases the points will just default and DVC will reclaim them. The last couple of years these defaulted points won't be worth selling, it will be better for DVC to rent the rooms for cash rather than sell the points. I believe that the percentage of points that will fall back to DVC the last couple of years will be sizable.
With a big chunk of points taken out of the system, the remaining owners will have an easier time booking with the inventory unused by DVC members then being rented for cash.