What Are the Challenges of Event Driven Architectures?

We needed something that can for process your data, but wouldn't stale you. We didat thought about messaging about a sincronous handling. It more simple, and it was good, but then softy revolting. And so s quite a few youth cases. Thar already sounds like this in the wild, and i'm sure ther comes wi different kinds of maturity as well. But coming from a building prospective, what are some of the challenges that you see people have when trying to build and even base architecture driven survles.