Even beyond that, there are two approaches you can take: writing your app in wasm, or writing libraries in wasm. Languages with larger runtimes may work for apps, but you don’t want to use them for libraries, because then you lug around every runtime for every language used. Even once wasm can integrate with the host’s GC, non-GC’d languages will have a place in implementing core libraries, for the same reason those languages have c extensions rather than extensions in other large runtime languages today.