I’ve been to many shows, from Usher, to Chris Brown, Alicia, Pink, Beyoncé... none of them happened to be late, except for Brandy. She was booed quite hard and her show lasted a bit over an hour.

Anyway... it’s called professionalism.
I don’t mind if there’s a 15 maximum 30 minute delay. But more than that... I feel being played for a fool.