like, I can at least understand the "I wish that RUC/GUC magically upgraded any ticket with last-seat availability" position, sure it would be great if I won the powerball every week.

what I don't understand is the "ugh Delta has devalued the RUC" argument in that post, they've basically been this way forever. If you have no ability to book in advance and you have zero flexibility, then yeah they're not that great, but they are what they are and they've been like that for at least 10 years.