I almost bought a used '16 S with jump seats, But my 3 y.o at time was bawling when I put her in there. Also worried about safety/hot back there w/o AC vents in AZ. Too bad TSLA discontinued rather than fixing the AC issue.
I'm hoping Y 3rd row won't have that issue. Also daughter is 7 now about 4ft. my mom is 5 ft tall so I hope they'll be comfy for quick trips.
I'm also watching used X prices that're dropping like a stone to lower than this new Y. but for early models and falcon wings (which my wife hates since she almost got hit by one, and one that failed during test drive!)