@dnstommy Model 3 back seat is very low to the floor. For preteen kids it's perfectly fine. If your family is on the taller side, then teenagers may not be comfortable for long trips. For me the 3 back seat is fine for short trips around town, but would be bad for long trips because my knees are in my face. We don't and won't take the 3 for longer trips with taller adults in the back.
The 3 trunk is also way more restrictive for hauling cargo. Any of S, X, or Y is much better for cargo than a 3. It's not just the space difference, though that's part of it. Sometimes with large items you can tell there's enough space inside the 3, but you can't fit them through any openings!
On the flip side...the 3 drives much, much better than a Y in my opinion - based on test drives of a 2021-Q2 MYLR and 2021-10 M3LR + M3P. Driving the 3 puts a smile on my face, and the ride quality is better than the Y too. The 3 is easily the most fun car in the Tesla S3XY lineup in my opinion. Plus the M3P gets Track Mode which really opens up more fun when opportunity allows, if you like pushing sporty cars to their limits. That was the key feature for me to get M3P over M3LR. Since you're in VT I'll mention that Track Mode seems like it would be very useful in the snow.
Driving-wise the Y is more of an appliance to me. I know some find it fun but I didn't, and I also hated the ride quality of the one I drove, it was super busy, felt very out of character for a family-friendly crossover. (And the handling wasn't anything special to make up for the poor ride.) The Y is very well packaged, it's a great utility vehicle, but what it gains in utility it loses in driving joy, in my opinion. (I will note that Tesla is known to change the suspension tuning of their cars over the years, sometimes without any announcement or official spec change, so it's quite possible that some Model Y ride better than the one I tested.)
Personally the 3's trunk is too restrictive for it be an only car for us. However as a 2nd car it was an easy choice to pick the M3P over the Y, and I have zero regrets about it! It's super fun and I always look forward to driving it. I don't think I'd look forward to driving a Y the same way.