is it just me? or the docs site are

Thanks for notifying, looking into it

LlamaIndex moved to mkdocs format for documentation, You will found out what you were looking for here: https://docs.llamaindex.ai/en/stable/api_reference/indices/vector/#llama_index.core.indices.VectorStoreIndex

You'll notice the documentation UI is different from what it used to be!

Ah yea, the api reference go a huge revamp