I do understand why people try this approach:

First: wasm is the perfect plug-in language, as it provides a high level of isolation and therefore security for the host app.

Second: the promise of wasm is that you can write it in any language. I think this is compelling for any application that seeks for extensibility.

Wether all this is worth the effort is probably the actual question. Maybe we will be surprised by killer plugins that wouldn’t be possible with regular plug-in systems…