Data point: AY 1335 upgrade cleared T-39. 2 passengers, 1 Plat and 1 Gold on the same booking.
Availability at T-48:
Fun fact, at T-39 once the upgrades cleared allt the exti-rows seat at row 11 and row 12 suddenly were free again and upfront went from 10 to 2 free on the seat map
.
Apparently not just our upgrades that cleared...