Whether the poster was "belittling Dropbox as a product" or "helpfully offering notes" seems like a judgment one can make about the exchange, regardless of poster's intent. I never understood this to be the reason it was referenced, more the SMOP thing. But I hear what you're saying about the details getting warped over time. (edit: And I do think people sometimes use it as a case of "if you listen to everyone's feedback..." but I think that still rings true: regardless of the judgment you place on it, it could have been demoralizing to Dropbox's founders.)

They dunk on it because the author didn't see the the benefit of the product over using FTP. And it's hard to say the usage of "quite trivially" isn't "belittling" in some form, although I don't think using a loaded word is useful here. Even the followup response shows the same issue with the commenter's thinking:

>You are correct that this presents a very good, easy-to-install piece of functionality for Windows users. The Windows shortcomings that you point out are certainly problems, and I think that your software does a good job of overcoming that. (emphasis added.)

They still fail to understand that this is not a Windows or Linux issue but a reliability and ease of use issue. Not to mention the fact that the desktop Linux marketshare was probably less than 1% and therefore irrelevant in this context to begin with.