A Renault Twingo weighs about 2150 lbs. This is a sensible car which seats two comfortably and four in a pinch. It also gets 40-50 mpg. No, you can't transport your quad with it, and it's not very useful when moving house. It's also not the right car if you're currently raising three kids; most aren't. The average occupancy rate for cars is 1.5.

Car taxation should scale quadratic with weight.

I think the issue with the nonlinear road wear taxation is that any fair system would have trucking paying basically 100% of the tax, and that would result in much higher goods transportation costs (I think it’s actually proportional to the 4th power of axle weight). Which I’m personally fine with, I think it’s bad policy to subsidize trucking over trains, but it’d be a big adjustment.

Eh that’s higher than the low end of an F-150, which isn’t something to be really proud of for a small car. The Model X is >5000 pounds. I think EVs are worth it overall, but something to keep in mind.