Ah shit, I made a thread and didn't check here first.
Yea, it's not surprising and the writing's been on the wall for awhile. Verizon's been gradually moving people away from unlimited data by removing the ability to upgrade and keep UDP (loopholes notwithstanding), raising out of contract data fees, introducing throttled unlimited data, etc.
I'm on contract until fall 2017, and by that point UDP could be completely gone. If they end it before then I'll probably move to Project Fi. I need to get a new phone pretty soon, and when the new Nexus devices come out I'll either spring for one of those or just get a 6P to hold me over as well as make the transition to Fi (or another compatible provider) smoother.