The examples of Dropbox and iPod being criticized on tech sites, but going on to become very successful, seems practically a part of the mythology at this point

The examples of Dropbox and iPod being criticized on tech sites, but going on to become very successful, seems practically a part of the mythology at this point - but it seems to be _always_ those two examples. Are there legitimately multiple good examples of "Criticized on HN pre-launch, yet became surprisingly successful"? I'm curious if the lesson to learn from Dropbox & iPod is more of "believe in a product, despite the criticism" or "sometimes, even accurate predictions are wrong"