Yeah this article is only about React. But it makes sense that someone would think this way because many dev's think JS web apps==react only.

The problem is react is "good enough" for most cases and the performance degradations happen slow enough that the devs/project leads don't see it until it's too late and they are already overly invested in there project and switching would be too compliated/costly for them.

Svelte/kit and properly optimized packages solve almost all of the "problems" this article tries to bring up.

To be fair though, even with Svelte et al bundle sizes can balloon quickly when using UI toolkits and other libraries.