5% of your drives sounds like a problem solved by a car rental, not by owning two vehicles.

Unless those 5% of rides start an airplane flight away, I can't imagine very many people are going to pay all the costs to own a car and all the costs and hassle/time-wastage of renting a car once or twice a month. They'll buy a PHEV, hybrid, or conventional car and wait for the BEVs to improve. (I'm a LEAF owner, but can trade cars with my spouse when I need to. I think twice in 7 years we've both needed to drive a distance in a single day where the shorter drive would stress the LEAF.)

Right, but that’s exactly my point, you wouldn’t own two vehicles, and you wouldn’t own one vehicle that still requires you to regularly rent a second vehicle. You’ll just own a single vehicle that covers 100% of your driving needs.