Wow Litestream sounds really interesting to me. I was just starting on an architecture, that was either stupid or genius, of using many SQLite databases on the server. Each user's account gets their own SQLite file. So the service's horizontal scaling is good (similar to the horizontal scaling of a document DB), and it naturally mitigates data leaks/injections. Also opens up a few neat tricks like the ability to do blue/green rollouts for schema changes. Anyway Litestream seems pretty ideal for that, will be checking it out!