Optimistic case:

A freak FUBAR of legacy systems, an unfortunate alignment of circumstances that could have happened anytime.

Pessimistic (paranoid) cases:

1. Intentional hacking by a foreign adversary 2. Vibe coding whoops 3. OpenAI agents "running experiments"

Any three of those pessimistic scenarios seem plausible though. Frightening. Intentional hack/exploit of air traffic control systems is the first thing that came to my mind when I first saw the news.

Now that the FAA has updated to say that it was the optimistic case, we now have:

Optimistic case: the FAA is telling the truth and it was a simple FUBAR

Pessimistic cases: remain the same, they just won't tell us :-)