It severely hurt the design of Model 3. The main purpose of that goofy long solid glass roof/back is to add a couple inches of headroom for second row passengers, without unduly compromising aerodynamics. And the solid glass back led to the trunk with the tiny cargo opening, rather than the hatchback/liftback design that works so well in the Model S and that so many of us were hoping for in the Model 3. It COULD have been a great EV design. Hopefully, it will still be a pretty good design, even without the liftback.