The Cabins will NOT go to zero. It's still a room at WDW, and even though the resale value will likely not be very high, it won't approach zero for a long, long time.
Vero Beach, like all the 2042 expiring contracts, will eventually reach zero. Speculation of which contract could go to zero first of those makes sense to think it will be Vero Beach or Hilton Head, since they are both overinflated dues, but people still look at them a cheap entry into the system. My guess is you don't see ever see a VB contract go for nothing until there is less than 5 years left on the contract.
ALL the 2042 contract locations are overinflated versus what they should be - and some like BCV and BWV are nearing ridiculous. $120 per point with 17 years left is $7.05 per point / per year. Riviera resale is running $140 / point so $3.05 per point. yes Riviera resale has the resort restrictions, but your paying $4 more per point, and worse than that in 17 years one contract is worthless and the other is probably still worth $140. "Correct" pricing right now for BWV and BCV should really be $80-90.
I've said this in other threads - but I bought my BWV contract in 2017 for $105 a point and I thought the price was terrible then. Yet here we are 7 years later and they are still going for more money than that. If someone is still buying BWV contracts for near $100 a point in 2032 I think I'll take my 15 years of travel to my favorite resort and pocket the savings and buy a Riviera resale contract instead.