There are tons of real-world use cases. WASM is more or more being used to extend applications with custom functions/plugins, as well as function-as-a-service

There are tons of real-world use cases. WASM is more or more being used to extend applications with custom functions/plugins, as well as function-as-a-service services. But they usually require writing custom code, specifically for these environments. The ability to build standard containers, use any languages and tools, run shell scripts, etc. makes WebAssembly far more accessible. Complex applications can be tested natively, and deployed effortlessly later to environments that require WebAssembly. From a performance perspective, this is not optimal. But from a productivity perspective, this is awesome, and definitely something to have in your toolbox when all you need is get things done.