That is, JS can be used to do everything but it is not optimal, or even near optimal (or even remotely close to) for many use cases. In terms of runtime or simplicity. But because it is capable and available, it has encroached into every niche (of html/css) until like any invasive species, it consumes and shreds through all available resources, collapses the whole ecosystem, and all complex creatures give way to a fresh start with new fairly rudimentary biology (wasm) trying to evolve towards and find a new stability point — hopefully one that does not invite a similar destructive species, but we’ll see how it goes