This isn’t true at all in Dart for example which is a WASM-GC language. Literally one of the very main selling points of Dart is you write your code once and it

This isn’t true at all in Dart for example which is a WASM-GC language. Literally one of the very main selling points of Dart is you write your code once and it runs anywhere, WASM is just another compile target like x64 or RISC-V or iOS.