1,973 votesMichael commented
i think this is mandatory for business use. the data running my company has to be stored nowhere but in my company.
i would appreciate a "connector" which lets you define data sources for the lists - like i do with the google calendar app on my phone: personal data is in the cloud, business data on MS Exchange, and the App combines both in one view, so at work i can always take care not to make business appointments on my marriage day, and at home i can take care not to make drinking apppointments when there's important work next day. withiout switching the app.