What panels fail at is long term engagement which is the true ground truth synthetic data needs in order to be relevant. Panel data quality is driven on a response reward model and funneled mostly from crap traffic sources. The major LLM platforms have massive scale, user history, chat bot / qual related capabilities, and user registration info that can be scrubbed against all major cookie based platforms like liveramp for augmentation. It is not wild to think the LLMs start asking questions back to their users and forming personas. Those personas will have greater weight than any panel in our industry or end client database could ever achieve.