It's clear that we're entering a new era of copyright _expectations_ (whether we get new _legislation_ is different), but for now realise this: the people like me who like copyleft can do this too. We can take software we like, point an agent at it, and tell it to make a new version with the AGPL3.0-or-later badge on the front.
The point of GPL is to restrict distribution. If there’s already an MIT version, it’s useless.
But the LLM contributions would likely be ruled public domain, so AGPL may not be enforceable on these.