> I would also welcome someone writing a short takedown where they fix the prompts and get better-than-2022 results from nbp

NBP (and the new ChatGPT generator) are integrated with LLMs to various degrees, so seems like the obvious starting point is a reverse approach: ask them to describe the old images which has the esthetics that Fernando Borretti likes, and start generating from those prompts. If you can recover the old images, then it was just a prompting issue. ("Sampling can show the presence of knowledge but not the absence.") If you can't even with their own 'native' descriptions, then that points to mode-collapse (especially all of the 'esthetic tuning' like DPO everyone does now) as being the biggest problem.