So here's a good example why I consider RPU worthless these days (particularly compared to how they used to work).
UA2364 SFO-EWR on 8/17 is presently booked just 14/28 in J a little over 36 hours out (slow week for business travel I guess). But it's R0.
UA basically will not clear RPU in advance on this route anymore, and undoubtedly will try to sell all 14 open seats at check-in to avoid giving them away for "free."
I'm booked in P so this really doesn't affect me, except to confirm that the upgrade game is not worth playing on this route.