And you start reading something so incomprehensible that you start to wonder if there's just this universe hiding in plain sight directly under the universe you've always known.

That is the precise feeling I get when I trying to understand this post.

Don't get me wrong, I appreciate the exposure, but damn if I'm not sweating trying to understand why this all matters.

As far as I can tell, it seems to be something halfway between TempleOS and MUMPS but its a programming language instead of an OS. I don't think you are missing some deep meaning. Its more that this is written in an esoteric language which seems to be more overloaded than Perl by someone who maybe isn't so great at clear communications. He's just looking at ways to make more efficient code in K (the language). But it does look sort of like he is talking about math theorems (he isn't).

I don't know array based languages well but I want to read the next one.