Pure speculation on one mans part, is, Orange & Black heard Alta was doing good with the bike itself, but was on the ropes money wise. They then threw a few nickels and dimes to Alta to get a look at what and how they were doing things.
After they got the info, they went back to doing what they do, building motorcycles.
As far as being the best electric wise, that's a toss up.
Look up Lightning Motorcycles. They have a sport bike with almost twice the range, for almost a third of the price.
But, that's all they have. You gotta admit, HD seems to be looking to offer electric in almost every type of 2 wheel thing out there. Given time, I would not be surprised to see something like the Alta at the local Harley dealer in a few years.
It's just business.