this paper is not good: it's easy to describe things in a categorical language (which this paper does), but not as easy to draw insights from that framework (which this paper does not do)
I don't think Google wants to recreate a GPT chatbot. Perhaps a conversation mode information retrieval interface, but not something you'd chat with. It would be more inline with their theme.
It seems to be ok, but as with other LLMs, can "hallucinate", though sometimes it provides sources to its claims, but only sometimes. If it works out, it could be very nice to Google I would imagine.