"...have been a solved problem and commodity for a while" So there's absolutely no room for improvement? Should we just move on from everything that we've deem

"...have been a solved problem and commodity for a while" So there's absolutely no room for improvement? Should we just move on from everything that we've deemed "a solved problem and commodity"? Another possibility: they want to foster an image of a product designed to last, with very little maintenance cost. I'm not suggesting car windows are a maintenance cost, by the way - just that it adds to the overall image of reliability. Additionally, I'm not sure where you draw the line at what are "non-problems" and what exactly is and is not "wasting tons of r&d dollars". Or, as others have suggested, what constitutes a "PR stunt". Is it wasting time and resource to select Tesla-specific paints, interior designs, wheel designs? After all, every other car has those. They are "solved problems" - just do whatever the other guys are doing!