That may be a great idea for a spinoff business, but SAP is all about apps and needs to focus on the move into the cloud. Oracle president Mark Hurd called this one right recently at the InformationWeek Conference: "If I was the other company [meaning SAP], I'd be very focused on getting my applications to the cloud." The cloud battle, he said, is not about the underlying platform.
After four years, Hana has established plenty of mindshare, but the marketshare is barely a dent in the market shares of IBM, Microsoft and Oracle, who dominate the database business. If you want to be a disruptive startup or open source company, better to focus on just that business. SAP has bigger fish to fry.