Originally Posted by Globaliser

Plenty of people do. But I don't like to do that. I don't routinely sleep in my normal clothes when I'm at home, and for the same reasons I like to change when I'm on board an aircraft.

Back to the original topic of this thread: I have once had to change in my seat at the end of a flight, when it became pretty clear that there wouldn't be enough time for me to do it in the loo. A blanket can cover a multitude of sins, and I wasn't exactly getting naked.