As an "outsider" who dabbles in wasm I never understood why running custom code on the server to generate "dynamic" webpages would be better then a dumb server which just serves files, and the dynamic part is running in the browser instead (other then that 90's web browsers sucked for this type of stuff). E.g. nothing will ever beat a dumb file server with a cdn in front when it comes to simplicity and scalability.
Because you can't guard your competitive advantage as easily when you need to send your entire codebase to the client, and it turns out companies like that stuff.
The only thing you can make use of is the design and the actual content.