The original thread was shitting on the idea of an online storage solution. The idea was good, its just every other tech company jumped on the same boat and crushed drop box.
Regarding USBs, Dropbox's messaging at the time was "throw out your USB drives", and this was before smartphones or ubiquitous dependable network connections. At the time, if I had to give a presentation in a university classroom, Dropbox wasn't moving the bar much on that particular problem.
Is your ego really that fragile that you can't admit you made a mistake judging a business?