so I'm on a United 757 in SFO heading to Hong Kong. Everyone is loaded on time. We see the safety video. We are still at the gate. Then the pilot comes on and says there are 39 planes ahead of us and ATC won't release us for another 90 minutes until some of these planes leave. W T F???? There's nothing going on with the weather here or anywhere. The airport isn't overly crowded or backed up. It's just another Tuesday. Can't someone schedule planes to actually leave on time? Is that so hard? So then the pilot says well maybe it's only 30 minutes. Then United sends me a text it's 50 minutes. Which is it? Some people have connections and need to know. Is it that difficult to figure out who is leaving when in the next hour? Maybe they need Watson!