[jdmichal]

There's also domain-specific language / slang.

I think this analogy is a good one. I've always held that software development has a crafty side in addition to the raw computer science. And I think you nailed it that this is where that comes in. There's multiple ways to write any program. So the only "complete" language is one that allows you to express anything and everything exactly the way you want to.

For instance, one could argue that using process forking vs threads vs fibers vs async / await are all just different connotations of the same denotation of "doing multiple things in parallel".