Earlier quoted context omitted.
What's also impressive is doing away with Dropbox's clunky "selective sync". While having everything stored locally sounds like a good idea at first, as you store more and more data is gets less and less user-friendly; in other words, power-users get the worst user experience. Additionally, creating an easy way to share files with friends without taking up their quota is awesome. This looks like it could be a very, v…
Not storing files locally sounds like a good idea at first - you don't have any syncing issues. But nobody has a perfect always-on internet connection. Having files local is worth the occasional sync cockup.
That said, my point is more that for people who start storing 100GB+ of data, it becomes harder and harder to actually manage which bits you want at any time.