When we were justifying the initial cost of
DVC, I figured out that if we decided we were 'too old" to use the last 12 years, and if we had no grandchildren we wanted to gift trips to, we could always rent the points and, even at today's rental rates, we'd be close to able to recoup the initial cost of our purchase.
So, yes, the 12 years were huge for us - even if I think I could be too old to enjoy them myself.
I don't really understand people purchasing resale at around the same $$ that they could a resort with a longer contract. I know people want the booking advantage - but IMHO it would have to be really, really, really important and you'd have to have very high-demand requests (like always wanting a GV at WLV Christmas week) to give up the opportunity of 12 or more additional contract years. I've never had trouble booking at 7 months.
Most of the "no room at the inn" posts are from people trying to book small resorts, at popular times, less than three months out. And most of those posts are from renters who have no idea how the 7/11 windows work or how you need to plan your DVC use in advance if you want to have your choice of units/resorts.