A graph isn't more mature than a loop — it's more expensive than one. The only question worth asking is whether you're buying something with that expense, and most teams can't say what.
The industry spent a month arguing about which box-and-arrow diagram to draw. The engineers who actually shipped something were asking a completely different question the whole time.
Most teams shipping 'agentic AI' this year are running a fifteen-line while-loop with a fancy name. That's not a confession — it's the correct architecture.
Feature tables don't tell you which AI agent framework to use. The coordination model does — explicit state graph, role-based crew, or one capable agent with skills.