From what I understand, PPBM is still being used, but it is limited to International and overwater flights (i.e. LAX-HNL).

I've been in the airport terminal when flights to places like NRT have been delayed and held at the gate while the GA's are franticly looking for a missing passenger.

Also been on Intl flights where we have had to wait for the unloading of bags from no-shows. For most domestic flights, I don't think they bother -- besides, there have been times my luggage has arrived on another flight before I have.

SDF_Traveler