The even bigger issue is that this will remain a niche thing.
Things that are a niche, will often sooner or later just die -
and nobody will even notice this. I don't understand the wasm
committee. Why design something that is bound to fail due to
barely anyone using it?
I think you overestimate how niche it really is. In the browser it's an essential part for many creative/productivity tools, e.g. Figma or Miro. On the backend it's used quite regularly as sandboxing mechanism or plugin system, e.g. Istio, Helm or OPA (so generally a high prominence in the CNCF ecosystem).
There are a lot more niche web standards that have a lot less usage that stuck around for a log time (e.g. the recent debate around removal of XSLT)
Things that are a niche, will often sooner or later just die - and nobody will even notice this. I don't understand the wasm committee. Why design something that is bound to fail due to barely anyone using it?