Necessary caution
Caution is inherent in many of the departments that chose to run SAP in the first place. Convincing them to move sensitive customer data to other people's computer systems is always going to be hard and that'e before anyone mentions compliance and data protection: contracts may stipulate that data must be processed on their own hardware and the fines for potential breaches of data protection law have always been steep.
Plus, having gone through all the pain and expense of installing SAP, few are going to have much appetite for migration: it will cost a fortune and the benefits will probably be small, come back in ten years or so…