I occasionally have to poke Tesla fanbois to remind them that a Tesla is not the perfect car for everyone. My wheelchair comment, in addition to being quite real, is also meant as a way to drag folks back down to earth.
The Lightning wouldn’t fit my need to carry my son while in his chair. He might enjoy riding in the bed with the wind in his hair, but I suspect the local constables won’t approve. 
I’m waiting for an electric full size van. That’s the most likely way to find an EV that works for the wheelchair. And that may actually happen, rather than a minivan, which I fear is dying as you suggest.
–Peter