Yeah unfortunately I think the selling point must be misrepresented. You could build and deploy a container image from scratch on Fly.io in under a minute, and I don't even think that's an exaggeration. I rigged a simple branch preview thing that used Gitlab CI and Helm+Kubernetes a few years ago and I still don't think it took more than 5 minutes to build and deploy. (We were just using cert manager, ingress nginx, and other somewhat standard tools, nothing special other than the container registry and parameters passed to helm.)