When we first began using Oracle DB extensively Postgres was not in a state where it could have handled our needs. Now we have existing systems that work on Ora

When we first began using Oracle DB extensively Postgres was not in a state where it could have handled our needs. Now we have existing systems that work on Oracle. It would be extremely expensive to change that -- both in money, and in risk, and in developer time. New apps are not being built on Oracle DB.