Some of that kerning looks pretty terrible.

The version on the right side of the “proportion” axis is monospaced.

That's basically just a boring old commutative diagram. You see them in a lot of places (ex the famous "lambda cube"[1]).

It's just an easy way to show a bunch of different variations of a thing when they cleanly split across properties and those properties commute.

1. https://en.wikipedia.org/wiki/Lambda_cube

I feel like this gif captures the feeling a lot of us are experiencing;

https://media1.tenor.com/m/RFe1swp-ZwkAAAAd/diablo-joke.gif

Arial, really? Arial?