The proof is (or isn't) in the game. If the game is something genuinely great then this all worked and is important. If the game is a bloviated, boring, and derivative mess then it didn't. Without any proof point on the output it is hard to say if the article has any value.
The player community seems to hold the opinion it's the latter. Steam reviews are pretty dire. Worse, there really aren't a lot of players. Certainly not enough to cover Yegge's absurd number of Claude Max accounts.
Eh. A quick scan of steam reviews shows a clear pattern - the game has been in decline ever since Yegge took over, well before LLMs were a product. It seems he started upsetting people with a capitalist-brain insistence on extracting value, and nothing has changed since. As long as he doesn't understand that his goals are contrary to building a game people enjoy, quality of the code is completely irrelevant. I don't think this one works as a test case on the value of programming like this, as the intended audience just isn't interested.