You'll notice that basically everyone involved with WASM agrees that it won't be used for full applications any time soon if ever. It's only people who aren't as involved who are calling for it.
WASM is not a replacement for javascript, and it's not trying to be. You won't be writing entire applications in whatever you compile to WASM, it's not how it's designed, it's not how it's meant to run, and it's worse in most ways than just compiling your favorite language to javascript (which has been possible for a long time now, but nobody uses it because it's such a leaky abstraction).
The open web is flourishing more than ever, and WASM is keeping that alive with it's "text" mode.
WASM is not a replacement for javascript, and it's not trying to be. You won't be writing entire applications in whatever you compile to WASM, it's not how it's designed, it's not how it's meant to run, and it's worse in most ways than just compiling your favorite language to javascript (which has been possible for a long time now, but nobody uses it because it's such a leaky abstraction).
The open web is flourishing more than ever, and WASM is keeping that alive with it's "text" mode.