[cramsdale]

To your first point though, streaming services typically are more focused on storage and egress (network) optimizations. App Engine has integration points with each, but its core workloads fall more in the dynamic web app and mobile backend realm. Within Spotify's architecture, there are places where App Engine makes sense (e.g. hosting their frontend APIs). That said, this is small relative to the rest of their architecture and understandably isn't the first area of focus when you're making a move to a new vendor.