I agree it would be a nonsense to walk around the airport mask free and then put it on at the plane door, I wonder how people might be put off travel though if they were no longer mandatory on planes as project fear has done such a good job? That makes me think unfortunately they will stay longer than really necessary, and we need to wait for other countries to drop the requirement to wear them indoors and I think we're a way off that too, eg Spain has only just dropped the outdoor mask rule again.