There is no obligation to do that. I think the landscape would be very different now if one of the big labs had released an earlier “frontier” model under copyleft that requires sharing fine tunes. I hope it still happens.

Dario is convinced that will create SkyNet, and so no, it will never happen. Only the blessed members of the True Church Of Effective Altruism can approach the Ark of the Covenant. The unwashed cannot be trusted.