A couple of things: when I think about it, I implicitly think about it as a vendor specific thing. Like Tesla supercharger stations. Agree that battery standards across makers likely impossible. Second, I think the major upside is removing a large potential liability from each vehicle - as hybrid vehicles are entering "old used car" ages/mileages, all your points about assessing the health of the battery apply to 2ary buyers and ability for people to monetize their old vehicles.

Bringing it back around to the topic, I don't know that we can wait on solid state and this represents a work around while smarter people that I can figure that out.