There is something about agent workflow builders not gaining as much traction as they could have. Open AI also launched something in house and they are also shutting it down
https://developers.openai.com/api/docs/guides/agent-builder
OpenAI is deprecating Agent Builder. Existing users can continue using it during the transition window, and the product is scheduled to shut down on November 30, 2026. ChatKit remains available. See the deprecations page for the current timeline.
I think it's the cost (both tokens and initial setup and debugging the workflow).
It's really easy to spend a gazillion tokens by mistake and the resulting workflows are still probabilistic and open for abuse or failure.
Maybe it's too soon, we need more time to figure out what works and what doesn't.
We're still looking for the right balance for when a probabilistic solution (i.e AI) works and when we need a deterministic one (classic software).