WebAssembly's GC isn't just some arbitrary new GC, it's the JavaScript GC. The benefit there is so wasm apps can integrate with JS and the DOM directly the same

WebAssembly's GC isn't just some arbitrary new GC, it's the JavaScript GC. The benefit there is so wasm apps can integrate with JS and the DOM directly the same way things like Python or Ruby plugins written in C integrate with those GCs. Nothing prevents wasm apps from using their own GC as well.