Happiness is... finally clearing at T-24 on what I believe is United's longest route with bog - standard Domestic F:
ORD-ANC
737-800
Booked W 4 weeks out
Applied at booking
Finally cleared at T-24h
1K.
6.75 hours is a long time to be in Y! They seem to hold out seats pretty aggressively for upsells at check-in on this route.