I don't have anything new to add to the thread aside from an additional .... Someone flying 64 BOS-SFO R/Ts in Main Cabin no longer qualifies for Diamond, and for 59 of those trips, they won't be allowed into the lounge using their paid membership (starting in 2025).

This is ridiculous. I will be rebooking my full fare FC international travel to different carriers later today. I was willing to deal with DL's shortcomings as an "investment" in my status, but with DL effectively canceling their loyalty program, there's truly no reason make that sacrifice. I will also be canceling my Reserve card now that even that program has been gutted.