Actually, phpBB 2.0.0 which was released in 2002 supported: IBM DB2, MS Access, MS SQL, MySQL3, MySQL4, Oracle... and Postgres 7. But you are right, many of th

Actually, phpBB 2.0.0 which was released in 2002 supported: IBM DB2, MS Access, MS SQL, MySQL3, MySQL4, Oracle... and Postgres 7. But you are right, many of the other popular projects did not make this effort.