Reason why oracle is case sensitive?

Question

Is there a reason why Oracle is case sensitive and others like SQL Server, and MySQL are not by default?

I know that there are ways to enable/disabl

Answer 1

If I had to guess, I'd say for historical/backwards-compatibility reasons.
Oracle first came out in 1977, and it was likely computationally expensive with the technology at the time to do the extra work for case-insensitive searches, so they just opted for exact matches.