Isn't the downside of other timeshares that do not expire is that they usually end up with some special assessments, etc later in their lift to do major rehab/structural work on the buildings. I seem to recall that being a major issue with some of the timeshares out there.
This is the reason we were given for the expiration at Disney (our guide has always been trustworthy and never just fed us a line, but was upfront). That the typical lifespan of a building is about 50 years before it would need a major upgrade, allowing the owners not to have to finance that cost.
Special assessments are a risk for all timeshare including DVC. In my experience, SA for well run timeshares are small and based on upgrades, not routine maint. Paying 50% more (DVC) to avoid the possibility of a SA doesn't make sense. You can bet that DVC will eventually have a SA also, VB almost did after the hurricanes a few years ago. While there is likely some truth to the fact that wooden buildings have a value to around 50 years, the guides would not be privy to such reasoning. If you were told that, it was sales speak. He may have believed it & it may have been the water cooler discussion and it may have been DVC's thinking, but he would not have had a way to truly know that information. IMO, it really only makes sense to put a value on the deeded issue if you get something else for it (say FL resident discounts) or one has reason to believe the location will have the same inherent value (beach, NYC, etc). I'd not sure you can truly say that about Disney 30-50 years from now.
I've stayed at other timeshares in Orlando, and their accomodations were just as good if not better than the DIsney resorts. It's a choice, but for me the expiration feature played no part in my decision to purchase DVC over another. I love being on-site, I love Disney and I absolutely fell in love with OKW! DVC is not for every body and I don't try to sell anyone on it! No one could have sold me on DVC until I stayed at OKW 3 or 4 times using a friends points!
I'll be 80 years old when my DVC runs out, and at that point It will be up to my son to decide how he wants to vacation with his family! I will have done my part!
Obviously it depends on what value one places on certain aspects. Ignoring the location and just looking side by side, DVC still have very nice resorts. If theming is important to you, DVC will stand out. On all other aspects, there are maybe 8-10 resorts in the Orlando area that are at least equal and in many ways, better, than DVC. Areas I'd use to compare outside of theming are room size, quality of furnishings, pool, other amenities and activities. For HH there are maybe 4-5 that one could say the same about.
However, one can't truly get away from location and taking that into account, DVC still has the premier resorts in Orlando, even if they lag slightly behind in some areas compared to other top options in the area. IMO, the same cannot be said for HH, actually the reverse it true due to the Beach draw. VB is somewhat neutral due to less competition in the general area with the 2 Marriott's in West Palm being the best comparisons.
On the RTU, this is a definite consideration for resale purchases and all 2042 options going forward