I vote borrowing. Anything prepaid is better to use sooner vs. later. The value always diminishes once they have your money. That's generally less so with DVC, but even here we have the original 2020 point reallocation that raised the point cost for most rooms. With borrowing, the 2020 points would have been redeemed at the 2019 rate.
I agree. Also, when you have more than 1 contract or home resort, it's easier to be in slight borrowing mode so you are not at risk of losing points. I'm a point miser, and unless I have a solid plan to use the banked points and then some the following year, having banked points puts me in a use them or lose them position, and sometimes life happens. For example - we are "only" planning 1 big trip in the summer of 2020. We will have a few banked points from our BLT and RIV contracts that we will have to use, but there's only about 1 night's worth of banked points to use. If we don't also use our current 2020 UY points, we will be in a banking situation in 2021, and so on. And if any of those future years, life happens, we run the risk of losing those banked points. I know you can always rent the points or transfer them, but the amount of points is not really big enough to make it worth the hassle.
And, more to the point, we are only planning 1 trip in 2020, and we have to use banked points from 2 resorts, which means we will have to be booking a split stay at 11 months and then deciding whether to consolidate somewhere at 7 mos. On top of that, that was the trip we were hoping to take some extended family, and if you read on these boards, those are the trips that are most likely to end up with people bailing or changing plans at the last minute. (Or there will be family that will complain about having to move resorts, etc. etc.)
...At the end of day, you paid for all the points so when you use them doesn't really matter.
That's kind of what the guide said to me when talking about the difference between Feb UY and Aug UY at RIV. I said, we'd have current (2019) UY points to spend for our Dec. 2019 trip, rather than having to borrow from Feb 2020 (there are no Feb 2019 points for RIV). The guide said, "but works out in the end because at the end of the contract you'll get points; you get 50 years of points no matter what." I looked at them and said, "I am not going to care about those points 50 years from now. I'd rather have more points up front." To which the guide said, "Yeah. You have a point there."