I've worked places where there is a rule that "The Corporate Database is Oracle and Oracle Only". Any mention of database _at_all_ will mean someone will ensure that The Corporate Database is used. It doesn't matter if Postgres or SQLite would be a cheaper/better choice.
I'm seeing this too ; the choice is company-wide, the licenses are bought company wide. And yes it would save money in many departmental apps; no-one seems to care.
I've worked places where there is a rule that "The Corporate Database is Oracle and Oracle Only". Any mention of database _at_all_ will mean someone will ensure that The Corporate Database is used. It doesn't matter if Postgres or SQLite would be a cheaper/better choice.