Yes people have left. In a normal company, the management would be concerned about the best people leaving, but at Oracle, the management does not see any value in its employees. The management loves people to leave. They don't see the quality and competence leaving, they just see the short term more expensive employees leaving and they are thrilled.
The management is made up of total id--ts with brains that never developed beyond junior high.
They think they will hire cheap replacements in India with no experience and somehow they will magically do all the work for the lying, cheating management in the US.
This post gives a good summation of the whole situation of people leaving. Hope that @YIkWtcV-1vdi doesn’t mind me reposting it.