[btown]

Dropbox actually did have other sync products, such as their now-discontinued Firebase-like Datastore API. https://blogs.dropbox.com/developers/2015/04/deprecating-the...

Their focus is wholly on owning the file management space, with most profit coming from doing so for enterprises. While the Googles and Apples of the world have found significant success in building entire suites of related products and services (including physical), there are plenty of successful public one-trick pony software companies. Dropbox's key has always been the magical quality of their service, and that's as good a reason to be on the focused-side of the spectrum as any.