Elon Musk: Tesla Model 3 production was 'a deeper level of hell than we expected'

To the dismay of electric-vehicle customers, delivery dates for some customers who ordered Tesla's Model 3 all-electric sedan have been pushed back — again. 
SEE ALSO: Everything you need to know about the Tesla Model 3
Refreshingly, on Tesla's Q4 earnings call Wednesday, CEO Elon Musk was contrite, and transparent about the cause of the delay.
"While there were challenges associated with Model 3 ramp, we were in a deeper level of hell than we expected," Musk said. "Still a few levels