My outsider's interpretation is that a lot of the details are being held up while the Component Model spec is finalised, so even if lots of ideas are being bounced around and people are experimenting, we won't see a "Snapshot 2" or many new modules (etc.) until that settles.

After that is done, I'd expect to see a lot of focus shift to fleshing out various WASI APIs, which can then also IINM start to be released individually at their own pace.