It does feel like WebAssembly development has stalled after the initial release. There are proposals for reference types, garbage collection, and host bindings that would greatly expand a WebAssembly binary's capabilities, but they haven't been implemented in any browser, much less standardized yet.

WebAssembly proposals tracker: https://github.com/WebAssembly/proposals

WebAssembly reference types (https://github.com/WebAssembly/reference-types/blob/master/p...) looks like the blocker for a lot of things, and it's in the final spec phase at least.

In Chrome, it's behind a flag since 78, which went stable in Oct 22 2019: https://chromestatus.com/features/5166497248837632 But also under active development? https://bugs.chromium.org/p/v8/issues/detail?id=7581

Supposedly implemented in Firefox two years ago: https://bugzilla.mozilla.org/show_bug.cgi?id=1444925

Nothing in Safari, of course.

Where is it now though?