Can't stop your business with a slow or no internet connection
We agree with your hybrid argument. At Bizantra we're using the hybrid online/offline cloud model for a complete small & startup business software suite that includes document sharing and crm amongst other essential functions such as finance & employee record keeping. Everything will run offline, and when online constantly synchronises with centralised cloud servers so users can work anywhere. Web access is there when needed but the local app runs a lot faster.
We didn't want a system where you can't work if you're disconnected. That's ok for photos and music but not for business critical functions.