The disembarkment from the cars to the tarmac should be almost instantaneous, and there is plenty of room there to queue if passengers are arriving faster then

The disembarkment from the cars to the tarmac should be almost instantaneous, and there is plenty of room there to queue if passengers are arriving faster then they can take their seats in the plane (a rare occurrence, absent other upstream sync points). There should be no traffic congestion and choke points in a properly designed airport because there is an enormous amount of horizontal space. Failures due to very specific processes are a typical situation now - I recently waited about 20 minutes when the transfer bus would no longer start, then wasted another 15-20 minutes because the replacement bus took us to the arrivals section of another terminal - while we needed to connect to another flight on the same terminal. Had to go through baggage control again, passports, had to wait for the Frankfurt monorail mentioned above, almost lost the connecting flight. Seems to me a flexible fleet could improve this situation enormously with awareness of the passenger circumstances - even to the point of taking you straight to your connecting plane without visiting the terminal. Failure should be isolated to the affected passengers, short of catastrophic events where there is no routearound.