Yeah the intelligence is still in the model. The promise of symbolic AI is about logic programming/ formal semantics not recursive loops.
To a large extent the idea has failed because it proved too hard to get non-experts to represent systems formally.
I still think there's potential value in a hybrid approach - e.g. get language models to do the representation then let them use formal reasoners/ verification instead of hallucinating.
We spin up a VPS on demand then tear it down again once they've finished playing.
Some months we accrue so little use that Hetzner doesn't bother issuing an invoice!
We've shared the provisioning scripts on Codeberg if you want to try it ou: LuanParty.