The original post wasn't insightful at all. That arrogant, know-it-all attitude is not how DropBox got their interface right. They got their interface right through careful attention to their users, by being humble enough to trust the user data and throw away features they had thought would be useful.

EDIT: Downvoted, great. This must be the ultimate triumph of snark: we are now perpetuating the myth that common sense and a sassy attitude is how DropBox created a breakthrough product, instead of careful beta testing and analysis of usage data.