I am well aware of that. My point is a web browser, originally a hypertext viewer, is now a clunky runtime for all sorts of ad-hoc standards including a WASM VM. So instead, start with a portable WASM VM that is a light weight OS that you build a browser inside of composed of individual components like Lego. You get all the benefits of having a real OS including process isolation, memory management, file system, security, and tooling. WASI is a POSIX like ABI/API that does not fit the Plan 9/Inferno design as they thankfully aren't Unix.