Indeed, it is a big factor of survivorship bias. The refrain against Dropbox is notable because Dropbox is the exception, being successful, not the norm. People don't realize how many startups have failed where people echoed the same old HN comment regarding these startups as having been said about Dropbox too.
it's the same as the quote we keep hearing "every big new thing started out looking like a toy". Somehow a bunch of people who should know better (intentionally?) misinterpreted that as every new toy is the next big thing.
