Compilation target support from Go and other languages makes it really easy to provide your library to websites - which we use for demos. It's quick to compile Go code into WASM and show folks quickly what your library offers.
Plus the demo's computation happens client side so no data is sent to a server.
We can offer our full payment parsing libraries to the web as developer tools without any code changes. I don't have to care about the details of WASM because it "just works".