I don't see a need for it. Maybe for some higher level scripting, but I don't have any plans for that.

A big advantage of WasmGC is it would allow your binaries to be smaller, since you wouldn't need to bundle an allocator for heap::alloc and free. Kotlin and Java binaries can in some cases be be much smaller than C++ and Rust for that reason.

Alright, will take a look at it sometime. But the more interesting proposal for me right now is the component model.