What web APIs are you waiting to see adoption of TOP? For me its: https://wicg.github.io/local-font-access/https://w3c.github.io/webcodecs/
Of course Webassembly could also do this, but it has no way of drawing to the screen. Natrually we can give it access to WASI, but it would need at least a DOM API (if the DOM plans to remain relevant into the future, and its questionable if this is even desireable), but more interestingly just the canvas APIs are sufficent I think. Not that the HTML required to ratchet into JS mode is signifigant, but the JS required to bring us up into a reasonable WASM execution environment can be rather large, even if current "toolchains" bloat it unncessarily.