Svelte

React is dead. Long live Svelte! Or not?

Svelte is a new UI framework that uses observables like Knockout.js, but processes them at compile time generating efficient updates.

The best way to learn about weaknesses of some product is to read/watch rants by competitors. Like in the following presentation:

I haven't yet seen more insults in thirty minutes talk (I could also make some when I was younger, but not as much).

In the best tradition of learning about weaknesses, let's recommend an article by a long time react user.

Clearly the static analysis has its limit. To quote "...that brings some crazy patterns...":

const foo = obj.foo;
foo.bar = 'baz';
obj = obj; // If you don't do this, update will not happen

and updating arrays with simple push doesn't work. Is that a progress? Even knockout.js could do it!