Missed my first miles/systemwide upgrade ever on Saturday's AA78 (7:15 pm DFW-LHR). Frustrating, because the 10:10 departure was C3. I did ask at the DFW "premium" lounge about changing to the later flight (which would have required changing my LHR-MUC segment); no way to do it other than to re-ticket.

Fortunately, I was in W, and I don't sleep on TATLs anyway, so really not a problem.