Mods - I think this deserves its own thread for now, but understand if you want to merge.
SWUs are now possible on BA, as confirmed by AA's website.
Called EXP desk and futher learned:
- upgrade inventory (seems to be) derived from Miles SAAver awards - so if you are booked in Club Suites / World, you can go to First if Z is available
- on short-haul segments you go from World Traveler (Economy) to Club Europe (Business), on long-haul you go from World Traveler to World Traveler Plus (PE), so for long-haul you need to buy PE if you want J
- can't waitlist upgrades, and you can't yet search on Expert Flyer, so the best way to find availability right now is searching for award tickets for one-way segments on AA's website then calling to confirm (unfortunately, the "Systemwide upgrades" link doesn't appear if you try to buy a ticket with cash)
Even if this benefit is cumbersome to use, I have to give AA a lot of credit for genuinely improving a benefit.