I'm not sure what the author is getting at but I think the Model X is a mistake- mostly only because of the falcon doors.
1. It is too ostentatious for most people - especially in its biggest market- the bay area. You can hide a gold iphone or Rolex watch but you can't hide when you open the falcon door while dropping off your kids to school.
2. The door also drastically reduces the headroom for the 2nd row and it feels like a Nascar racing car with all kinds of bracing in the back. About making it easy to get into the 3rd row is not really true. It is no different than any 3 row SUVs. The tall fixed headrests also limit visibility in the back rows.
3. I think Elon is a pragmatist and if he decides to change the falcon doors to regular doors, I think the ModelX will trump Acura MDX and BMWX5 in Sales very easily. Everything else in the ModelX just blows everyone else out of the water.