[still_grokking]

Almost no languages run as WASM.

This is not likely to change anytime soon (if ever), as nobody is working on this, and there is even quite strong opposition to get features in that are fundamentally needed to run anything else than the very few languages that already compile to WASM. ("Nobody" is interested in invalidating their investment in JS ;-)).

Also WASM is actually slow, or better said, "it does not deliver its full potential".

It will need advanced JIT compilers to keep up with the other two mayor VM langues. But in this regard WASM is behind around 20 years of constant development and improvement.

My strongest hopes in this regard are currently with Microsoft (even I don't trust this company at all!), who are indeed interested to run their CLR stuff in a WASM VM, and could probably deliver on the needed features. But then, when you would run a CLR-VM (or a JVM) on top of a WASM VM, you know, you're building just the next Matryoshka… There are no real benefits to that besides "look mom, it runs in the browser".