Nope. In the default rollback-journal mode, SQLite supports either multiple readers or a single writer at a time. WAL mode improves this to multiple readers and

Nope. In the default rollback-journal mode, SQLite supports either multiple readers or a single writer at a time. WAL mode improves this to multiple readers and at most one writer. But transactions in SQLite are often fast enough that this could still be acceptable for a lot of purposes, especially on an SSD.