Exactly. YOLO runs of frontier models with a single random seed/data shuffle are pretty limited for trying to study the “molecular biology”. I actually like to think of LLM understanding as being like biology in the 1850s. There's lots of inspiration to be found in how biology has advanced since then and the types of experiments we might run to better understand LLMs.
Its something I keep thinking about when I see all these deep-dives by Anthropic on the "genetics" of LLMs. I see the emergent properties of LLMs as inseparable from their data environment. If the organization/prevalence of text online was different, I think Anthropic would see different "genetics". As the amt of LLM-generated text grows, I think it will become more clear that the "fundamental unit" is their relationship.