Access to top-notch support.
If you move to SalesLogix Cloud you will not have to worry about support. You will be provided with provisioning/setup, backups, hosting infrastructure support, and Windows and database maintenance from the Sage Service Operations team and you will still be able to rely on your Business Partner to help you with customizations, troubleshooting, etc. Life could get just a little easier if you move to the cloud. 
-Brianna