Their hub motor actually doesn't surprise me

Efficiency wise, it's less than a conventional motor, but that doesn't actually matter. If the crap from the road can be kept from grinding it away without washing after every ride, it's going to be as good as a chain (I hate chains, I know shafts are heavier and nominally less efficient, but they're nice)

The battery stuff is really interesting though

I see fake videos about BYD batteries etc. but criticism of the Donut Lab stuff has been conspicuously quiet

The ramifications of SSBs would be truly revolutionary on a global scale, and will change more things than people can imagine

So, while I have reservations, I have a huge amount of hope too