What's it like to build for an unreleased OS?

Last year Amazon shipped Vega, a brand new operating system, with hundreds of apps already live on the platform. How did that happen, so many apps already live and performant on launch day? And what was that like, building for a platform while it's still being built? Like aiming for a moving target from atop a moving vehicle. I helped host a Vega meetup in Munich and three devs were generous enough to share their from-the-trenches perspectives on this unique challenge. Sebastian Mader , a senior