Why does your most important database run on Oracle 10.2.0.4?

Today is a sunny day. A wonderful beautiful spring day. Flowers are blooming. Trees are getting green. Birds are singing. All fine. And then I find this email in my inbox. A customer wants to migrate between two Big Endiann platforms with a important ERP system. Nothing special – until I read this: The ERP system is currently on Oracle 10.2.0.4 – and it should stay on Oracle 10.2.0.4. The first question I have: Why does your most important database run on Oracle 10.2.0.4? In 2018. Why does your most important database run on Oracle 10.2.0.4? This is of course…