Hello there, I just got AA platinum status thanks to an asia flight + plat challege. What does this get me other than lounge, dbl miles, and free checked bags? Is lounge access for aa only? or can i use all oneworld lounges now? also if i'm flying another carrier but theres a oneworld lounge there can i still use it? Also how do you get upgraded on flights? can i just buy normal coach fares and hope to get upgraded at the gate? Not really sure how that works. Thanks in advance!