Autothrust Blue
Welcome aboard the Washington State Ferries
Yes, that's what most right thinking people, uh, think...No, not at all the case everywhere.
I was in a meeting in DC specifically about this with the FAA two weeks ago.
There are a very small number of carriers taking the stance of no extension = fatigued or worse still, disciplinary action, but the consensus is not at all that. No extension simply means the crew is done flying for the day at the usual "Table B" amount of time.