What you're saying really strikes true, though I feel arrogant people can also be extremely hard working which can put them in better stead compared to others. Also, humbleness with a tint of arrogance or self belief can be a good mix – as long as you get the mix right.
At first face it looks a genius idea, but the more I think about it the less convinced I am about it all.
It seems as though it has combined automatic polling and asynchronous updating together, and has removed traditional controllers and models. Yeah, it's cool out of the box and yeah, it's great for scaffolding and rapid development.
But really, it seems like another stack to learn and completely depend upon, and with codebase that 'liquid' it seems like it's much riskier than doing things traditionally. I'd be worried that it auto-injects into the running app.
Don't get me wrong — it's amazing. But what's the real, actual benefit here?
It's always been on there.