[emh68]

Here let me try:

What's important to understand is, Docker exists because Oracle made Java too scary to touch, thanks to big ongoing lawsuits against Google, and demanding royalties just for running a JVM server. Also the JVM is fast, but it's slow enough that it's within striking distance of a full cgroup, running a full Linux kernel.

So it made sense to just create Docker, and allow people to abandon things like jruby, and just run normal Ruby in a Docker container.

WASM is what people would have wanted when Docker was created. A bytecode format like JVM, but faster, and not encumbered by big bad Oracle's coffer-rattling.

So in other words, if WASM had existed when Docker was created, people would have just recompiled their apps for WASM bytecode, and would have also recompiled things like MongoDB and MariaDB for WASM. Things like network syscalls would be replaced by traps to the webassembly runtime.