Loading time is pretty rough, but it seems responsive enough after the initial load. Probably as fast or faster than downloading and installing GHC locally.

For comparison: the homepage of cnn.com right now is 33.37MB on my machine. 16.82MB of which is JavaScript.

I would assume that in the near future one can preload, cache, update selected WASM packages. I also imagine that sooner than that we can preload open models in the browser to run the natively instead of only invoking third parties (e.g. window.ai in the DOM)