Originally Posted by anteater

At least only AA EP elites will be the only AA tier eligible for FC upgrades on AS. Though, upgrade window of 120 hours will likely negatively impact AS Golds and any G/G75K attempting to SDC, with respect to U space opening up prior to T-24.

I hope that one benefit of the upcoming “MVP 100K” tier is confirmed SDC into the same cabin as long as any seat is available in said cabin, even if upgraded into U class on original flight.