Good point. But as we know multi-tasking is really not truly parallelism, it just means interleaving and keeping the state of multiple sequential lines of thoug

Good point. But as we know multi-tasking is really not truly parallelism, it just means interleaving and keeping the state of multiple sequential lines of thought in our "head-stack". Async is difficult I believe because "thinking" in inherently sequential because it is based on mentally reciting some (serial linear single-dimensional) language in our head. An alternative could be some visual language where parallel and even 3D lines can be drawn. A mental image of it can be in our head. So I think async inherently needs some kind of visual language to make it easier to grok.