" but I don't think they address the current grid's ability to handle 7M vehicles charging overnight."

BINGO! We have a winner!

Lots of talk about infrastructure to be built (like gas stations...) but few ever address the real infrastructure costs for thousands of home charging systems in each neighbourhood.

I have to add that Tesla is not commercially viable and never will be. When the government hand-outs end I expect them to close their doors leaving Tesla owners....in the dark.

Chevy Volt; an actual viable alternative with established private corporate support, not government dollars. I am mildly interested.