I'm building a product and exploring these questions in that domain. I'm thinking about it a little differently. I have a known set of hardware sensors that I'm collecting all the data from. Per sensor the data has a strong schema with a timestamp, what is interesting is the insights that can be gleaned across sensors. So what sensors do you have that you want to record, have a strong schema against that sensor, now have something you can use to tie across sensors, now you can use LLMs to query the data and draw interesting insights

You could even ask the LLM what other sensors fit here and how would it expand my knowledge in collaboration with the other sensors and data feeds.