I found it not very enlightening because the statement effectively boils down to the conversation between
Antony and Lepidus:
LEPIDUS: What manner o’ thing is your crocodile?
ANTONY: It is shaped, sir, like itself, and it is as broad as it hath breadth. It is just so high as it is, and moves with it own organs. It lives by that which nourisheth it, and the elements once out of it, it transmigrates.
...
"This thing is a perfect simulation of itself" is, in fact, literally an actual joke
made by SMBC. Almost a decade ago, in fact. Likewise things like "Buffyspeak." Hence I found it not very enlightening. Telling me the game simulates itself, that it works how it works because that how it worked before, and that changing it makes it "stop feeling like D&D," just...doesn't give me much information to work with.