Well, the data is absolutely not ephemeral: it's safely tucked away in S3. But to crib from https://neon.tech https://neon.tech, you might choose Neon because

Well, the data is absolutely not ephemeral: it's safely tucked away in S3. But to crib from https://neon.tech https://neon.tech, you might choose Neon because it's scalable, cost-effective, and easy to deploy and manage. Or you might choose it for its copy-on-write branching and point-in-time recovery, all open-source, and all on top of the solid, performant, feature-rich foundation that is Postgres. :)