Svelte is different from the rest of that list. In Svelte you don't use a virtual DOM to watch for changes, instead you compile the app and hard-code all changes.
Re:Ask HN: Is React too big to fail?
by schwartzworld on Tuesday July 20, 2021 @07:32PM
(#27900544)
That's a difference in implementation. You don't typically think about the virtual DOM when writing react.
Now, all its competitors (Vue, Flutter, Svelte, Solid) look very React-like to me. A few minor improvements in some areas but nothing groundbreakingly different.
Elm is different but remained niche and obviously too exotic for mainstream. There's something about the pure-functional approach that doesn't sit well with most people.