Feast, the open source feature store, has seen a dramatic rise in adoption as ML teams build out their operational ML use cases. The growth that Feast has experienced is in part due to the project being a community-driven effort, with development happening openly through public forums. However, designing out in the open hasn’t always been straightforward. As the Feast user base has grown, maintainers of the project have been faced with new and interesting challenges. In this talk we will share three examples of when the Feast community surprised us, and how that impacted the project’s direction.