You have repeatedly missed the point of the discussion because you are hyper-focused on the implementation details that are irrelevant to the end user. I honest

You have repeatedly missed the point of the discussion because you are hyper-focused on the implementation details that are irrelevant to the end user. I honestly don't know how you jumped from the JVM and CLR to Unisys Clearpath (twice) and Mesa/Cedar except as a red herring. The topic of discussion is Web Assembly which implies a modern browser. The majority of browsers now support Web Assembly and about half the global population has a web browser and access to the internet - and now, access to an actual universal bytecode based execution runtime by nature of being part of the web browser standards instead of an OS feature or framework installation or (god forbid) Oracle TOS. The C FFI part was an analogy. The whole point of Web Assembly is that it can't call out to just any library on the OS.