A growing SMB app hitting its first real concurrency problem faces a decision that's easy to get wrong in either direction: migrate to a client/server database too early and take on operational overhead the app doesn't need yet, or stay on SQLite too long and let write contention turn into user-facing timeouts. The …

Most small businesses end up with either PostgreSQL or MySQL not by deliberate choice but by default — the hosting stack their developer knows, the ORM the framework assumed, the tutorial they followed three years ago. That choice often works fine until the application grows and the team starts hitting edge cases: a …