All of those bytecode formats were designed to support higher abstractions. WASM on the other hand was born from asm.js, which tried to remove abstraction to ma

All of those bytecode formats were designed to support higher abstractions. WASM on the other hand was born from asm.js, which tried to remove abstraction to make code run faster. Ultimately the goal for WASM was to run code faster, hopefully near native speed, which is not a priority for all the bytecodes you mentioned. If that wasn't needed then Javascript would have been enough.