What, if anything, is actually gained from a business perspective by reducing a single library by 38kb? My guess is exactly nothing. And the benefit of sticking to React is not only the community, but the fact that they actually own their virtual DOM implementation and actively work to improve it (the forthcoming fiber rendering engine is a great example of that.)
I'm not hating on new technology, but this isn't actually new. It's a clone that isn't really bringing anything new to the table, and just muddies the water for developers. It's like if every few weeks there was a new take on Git that did practically the same thing but wasn't Git.
We'd be much better off if these people were contributing to React core. Because if it truly has the same capability as React, you should be able to shave the 38k off right?