Looks like today's UA SFO-TPE is having issues. We're back at the gate after spending a good amount of time on the tarmac, due to MX.
Question: if the flight is cancelled, can UA rebook a GPUd seat on today's BR flight in J, or would the upgrade be lost? (Not holding out a lot of hope. Looks like they're not disarming the doors and the BR flight is in an hour.)