It might not be about code reuse, but there will be things that can be ported, just not the DOM stuff (e.g. redux/flux logic, other UI-independent business logic).

I get the whole "because it's fun" reason - just make it clear that that's the motivation, and don't give the impression it's a serious React competitor if it has major shortcomings.

I'm fatigued by the continual "x times faster than React" libraries, as if that really matters. As with all the language/framework debates it comes down to the ecosystem. Raw speed just doesn't cut it for me.