A Microsoft researcher built a goat-powered LLM in Age of Empires II to prove it's not sentient
(www.xda-developers.com)
I'll believe it when it happens. There's a huge different between simulating 139,000 neurons and 50 billion neurons.
Besides, the authors looked at taste and touch sensory. That's not exactly predicting the entire behavior of a fly, and the authors (of which there were many), admitted they don't know if it can actually predict neural activity. Source