I believe this would mean giving up the main advantage DropBox has over all competitors: It's the first cloud storage provider that sucessfully mixes local stor

I believe this would mean giving up the main advantage DropBox has over all competitors: It's the first cloud storage provider that sucessfully mixes local storage and cloud storage by providing transparent synchonization. After all, the DropBox folder is just a plain folder, but it is sync'ed whenever something changes. Without the local storage part there would be no reason to use DropBox as one could simply use for example a WebDAV share or SFTP.