From the Boeing + pilots discussion posted by Haggart, the Boeing rep made one "dangerous" statement: (0:37)
Quote
In a million miles, you're going to fly this airplane, maybe once you're going to see this ever.

I guess he thought that was a rare occurrence?
Let's say a plane cruises at 300kts, that's approx. every ~3000 hours, you would run into this problem. With >300 737MAX already delivered, that would be an incident every ~10 hours.
Okay, he said "may" - assume it was a 1% chance in a million miles, that's then ~1000 hours. If the planes flew an average 10h a day, that would be an incident about every 3-4 month.
Still rare?!?!
He might want to check with his safety and quality experts before talking such numbers - that is, I hope he didn't!