Just checked out the interior dimensions of Model Y from the owner's manual. One measurement caught my eye (page 188 at https://www.tesla.com/sites/default/files/model_y_owners_manual_north_america_en.pdf)
Hip Room Front 53.8 in
Rear 50.6
Compare that with Model 3:
Hip Room Front 53.4
Rear 52.4
Note that Y is a whopping 1.8 inches narrower than 3 in the back seats. If this is not a typo, it's a big letdown for me. I was hoping that the second row would be a bit roomier than 3 width-wise. Most likely they pushed the second row further back, thus its longer leg room but narrower width. Model 3 is already kind of cramp for 3 in the back, I can't imagine how tight it is for Y.
Hip Room Front 53.8 in
Rear 50.6
Compare that with Model 3:
Hip Room Front 53.4
Rear 52.4
Note that Y is a whopping 1.8 inches narrower than 3 in the back seats. If this is not a typo, it's a big letdown for me. I was hoping that the second row would be a bit roomier than 3 width-wise. Most likely they pushed the second row further back, thus its longer leg room but narrower width. Model 3 is already kind of cramp for 3 in the back, I can't imagine how tight it is for Y.