This is a great idea and the first I've heard of it. Set a maximum weight of 5,000 lbs for an ordinary license. Minivans will come in just under the line. Small SUVs like the CRV or RAV4 will be allowed, as will small trucks like the Ford Maverick. Indeed, most of those vehicles are under 4,000 lbs. Even some larger SUVs like the Honda Pilot or (just barely) the Toyota 4runner get under the bar. Even a low-specced F-150. But nothing bigger than that.
Truth is, I'd prefer the bar at 4,000 lbs, which would limit us to Camrys and CRVs, but 5,000 would really allow just about any reasonable vehicle.
And big heavy EVs with massive acceleration are just too powerful for somebody who's got a Starbucks in one hand, a cell phone in the other, their knee on the wheel, and shouting kids in the back seat. "Pedal misapplication" will go tragic really fast.
5,000 lb limit.
Sincerely,
A Pedestrian