Technical details only verify Wasm's potential. Wide adoption is not a technical matter.

Just like with JVM and other better options before and after it, it's politics, interests and momentum. JVM in the browser was not killed by technology, it was killed by Microsoft. Similarly, we should look who gains and loses relative to other if Wasm becomes mainstream.

Easy portability and less platform dependence. Who wants it, who does not? Apple, Microsoft, Google, ...

Just like with JVM the Wasm can be killed with wrong embrace. Microsoft Java Virtual Machine (MSJVM) was named in the United States v. Microsoft Corp. antitrust civil actions, as an implementation of Microsoft's "Embrace, extend and extinguish" strategy. Adopt JVM, remove portability with extensions.