Databases often house an organization's key data and related business logic. It's not trivial to port such over. PostgreSql is not 100% compatible, and testing

Databases often house an organization's key data and related business logic. It's not trivial to port such over. PostgreSql is not 100% compatible, and testing and adjusting takes time. That being said, an org should foster open-source RDBMS for new projects that don't need heavy data-sharing with Oracle instances, and slowly expand. For one, Oracle sales-people will give you better deals if they know you are nurturing alternatives within. It's better if Oracle has you by one nut instead of two.