It's probably a mistake to put "SUVs and trucks" all in one bucket. Can you even fit a third car seat in a crew cab pickup, assuming two adults in the front?

See https://advocacy.consumerreports.org/research/the-rise-of-th...

That massive green chunk is for crossovers, which typically have space for two adults and two car seats. Fitting a third means graduating to a full-size SUV (or minivan), which means a significantly more expensive vehicle (assuming similar trim levels, etc).