I own three electric motorcycles and respectfully disagree. You can't make tube and canvas that let a passenger survive getting t-boned by a Yukon Denali or an F-250. One high-profile accident with a mother and her child getting peeled off the road with a coal shovel are all it'll take to kill such a form factor forever.

The problem isn't the form factor you're describing, it's that you can't put those on the road with 1000+ horsepower machines that are 50 times heavier. And on top of that, a lot of people just don't want to give up their heated massage seats and connected infotainment and removable third row or whatever crap they pack in minivans these days.