To quote Brian Lamb from this comment here:
I’m reminded of something George Siemens said at a symposium on distributed tool strategies: that schools should be in the business of managing data flows rather than in supporting an end to end user experience. We can only dream what might result if the energy going into the campus-wide LMS’s would go into creating flexible and easy to use “syndication buses” or to addressing pragmatic instructor challenges to using the “small pieces” approach — things like student management tools, gradebooks etc. And what about providing the service of institutional archiving and data backups to mitigate the risks of using third party tools?