[underwater]

I worked on JavaScript performance at Facebook. I completely agree that we need the things that you mentioned. The problem is that no one is building them.

Instead we get demo apps and poorly thought out blog posts that compare library bundle sizes. It's a distraction that doesn't address the problem and diverts attention from the real problems with web performance.

For almost any real world application the fixed overhead of React/Inferno/Preact will be quickly dwarfed by the overhead of application code, even with code splitting. Unless you can address that cost then you shouldn't be building a client rendered mobile app.