[paloaltokid]

Any stack really if you have a well-gelled team that knows how to communicate and collaborate well together. If you don't have that as your starting point, things will be hard.

Rails is great for certain types of web applications because of the fast feedback loop.

With that said, there are many other good stacks out there today that allow you to go fast. I think Rails is really a victim of its own success. What DHH got right was to focus on developer UX. Now all the other major stacks have understood that there's a new normal in terms of minimum acceptable developer UX quality level and minimum feedback cycle speed. Spring Boot (possibly with Kotlin), .Net Core (possibly with F#), SwiftUI, Jetpack Compose, React Native, React, etc. etc. Everyone is building to the "sexy" dev experience that Rails introduced. jQuery and Prototype were a big deal when they first came out as well.

You also need a good CI/CD pipeline and modern DevOps practices so you can decouple deployment from release.

But like I said before, team communication above all else.