@Bart *************
I didn’t say that the check is rare. They often check and I think they always check.
But they rarely force people to show the ticket. In many cases a simple “yes I know and I will extend at immigration” is enough.
But you obviously always had a ticket ready and showed it. Good for you.
And BTW. I once knew a German who was always taken out of line. At airports and at border crossing with car in Europe. Always!
It’s your face not your passport that makes them suspect something.