As far as I understand, with WAL, SQLite supports multiple readers plus one writer on a database. And multiple concurrent readers were always supported. So the

As far as I understand, with WAL, SQLite supports multiple readers plus one writer on a database. And multiple concurrent readers were always supported. So the limiting factor is not the degree of concurrency, but the amount of write-activity. Workloads that mostly read and only occasionally write to the database work well with SQLite.