Don't get me wrong, I think that is the sign of a very healthy ecosystem. I am just curious how the Rust evangelists will spin this. Somehow this constant churn on the Javascript side is worthy of snide, satire and ridicule.
IMO, UI development is deceptively hard. Rendering scalable graphics efficiently is hard enough. Creating a good layout engine and a set of reliable basic controls is even more difficult. But managing interfaces seems to scale quadratically with the number of controls, views, states, etc. I see programmers, over and over, underestimate how difficult of a task managing that complexity can be. This complexity leads to difficult to use libraries/framework/platforms. It also leads naive and ambitious developers to believe they can do better. This leads to more and more new libraries/frameworks/platforms.