What's the current status of WASM/WASI support?

[redthing1]

On Tuesday, 14 March 2023 at 23:45:12 UTC, ChrisG wrote:
> In 2019, there was a blog post that indicated a strong push for 
> wasm support was afoot. I've had a hard time pulling together 
> information since then. I was curious if anyone has a good 
> general perspective on the state of D wasm support. I can't 
> tell if it's a mostly dead subject. It looks like betterC 
> support is generally there, but I'm not sure about runtime or 
> library support. Specifically, I was interested in:
>
> - What's the runtime support story (can I use GC)?
> - What's the phobos support story?
> - Are there alternate general purpose libraries folks have 
> settled on for wasm development? (spasm?)
> - Anything about WASI or Emscripten?
>
> Thanks.

I was wondering actually, has anyone experimented with WASI + D? 
I am interested in looking into it.