Actually, the full quote is that the quality is best at the very beginning of a ramp up, and at the end of the ramp. We are at the beginning.Elon is on record stating that quality is worst during ramp-up. Does anyone know how long this takes?
Source: Elon Musk says don't buy a Tesla during production ramps for best quality
"Friends ask me, when should they buy a Tesla. Well, either buy it right at the beginning, or when production reaches a steady state," Musk said. "But during that production ramp, it's super hard to be in vertical climb mode and get everything right on the little details. It's just a super difficult thing."