No, I think most of the AOT compilers in practice are a bit behind V8 and/or Spidermonkey for newer features. Realistically, most development driving new WASM features is motivated by website-ish use cases. Exception handling in particular is still not standardized so I guess it's expected that the browser engines would be the one to have the most evolving support (and the ability to test it thoroughly) because people want that platform as their inevitable target anyway.