First, Heroku's pipelines and GitHub integration are (or, I guess, were) excellent.

We (Fly.io) intentionally didn't build a pipeline replacement. We exist for one reason: to run apps close to users. We're just now to the size where we can do that well. It'll be a while before we can get good at a second thing. Heroku shipped them something like 8 years after they launched.

At the same time, GitHub actions and Buildkite are _very_ good. They're less opinionated than Heroku Pipelines, but I don't regret figuring out how to use them for my own projects.

I think there's a chance that emulating Heroku that closely is a path to failure in the 2020s.