That's only true for triplet infants that require bassinet-style seats and even that might not be the case if you look hard enough. I had twins and a 3-year old

That's only true for triplet infants that require bassinet-style seats and even that might not be the case if you look hard enough. I had twins and a 3-year old in the back seat of an 1990 Infiniti G20. There are slim car seats specifically made for three in the back. It's tight, but it works. I agree about wagons though. Subaru still makes them. The Lexus CT200h is pretty much a wagon. It would be nice to see more "crossovers" that took more from the sedan side, however, none of the modern ones have jump seats except (maybe ironically) the Tesla Model 3. We've graduated to four kids which eliminates the vast majority of vehicles from our set of options. Kia, Hyundai, Toyota, and GM all make ≥6 passenger vehicles that are not-minivans, but the options are very limited and put you into the SUV category.