Ya. I almost bought the rear seats for my Model S to install.
After seeing rear-end crashes of the Model S and the crumple zone where the extra seats are (cars with the bumper support) - and this picture of the model y -- my kids aren't going anyways in those extra rear seats. High suv/truck + accident = crumbling of the crumble zone.
So to me, the model y is really only 5 seater and the CT is a 6. That's my thinking. Either way, with car seats -- I may be wrong -- but I am guessing that three won't fit in the model Y/CT 1st row since the middle seat is slim. If we have twins next (already have 1) -- then a minivan it will be. Maybe Tesla will have one out by then
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I don't like the model X and the rear doors. So it was out from the beginning.