JSX is not Javascript, you need to transpile, and not everybody wants to mess with webpack+babel or create-react-app, or anything other what involves downloading 1000+ packages from npm just to do some quick PoC. Sometimes you want to stay light (and fast), and incrementally build your stack, just you like can do with vue.

So I actaully like this project, thanks for this :-)

BTW: it's similar to lit-html, t7 and hyperx