Lots and lots of organizations would want a strong ChatGPT-like tool which is trained on a specific (likely not open) dataset of their choosing in addition to a

Lots and lots of organizations would want a strong ChatGPT-like tool which is trained on a specific (likely not open) dataset of their choosing in addition to all the large general data that grants "common sense" and language understanding. Your example for all laws of a certain country is a good one, and the legal department of some (for example) chemical megacorp would want that and also all the court cases that are even so slightly relevant, and all their contracts they have made since 1900, and all their internal policy documents - and that has quite some potential. But it really does need to be a large language model, for such scenarios, the differences between e.g. ChatGPT 3.5 or ChatGPT 4 or Llama or Llama 2 are meaningful.