Unlike telling people to drop Firefox, where there are good alternative browsers, telling people to drop Dropbox is far more difficult. None of the alternatives

Unlike telling people to drop Firefox, where there are good alternative browsers, telling people to drop Dropbox is far more difficult. None of the alternatives come near the usability of Dropbox for everyday users. Dropbox has stayed popular because of its combination of cross platform support, ease of setup, large feature set, and overall stability. Unless there is a competitor that can stand toe to toe in all of these areas, it's simply too difficult for non-technical users to switch.