I'd actually take that Alta SM! That is if Alta we're still around!They aren't the first by a long shot. Zero motorcycles have been around for years. I rode one and it was pretty decent too.
They aren't a major motorcycle manufacturer but bet your bottom dollar they have been studied by the big boys.
Here's a link to the best electric bikes of 2018 just for giggles (the Lightning LS218 is a brute).