The famous BrandonM comment on the announcement of Dropbox on 2007-04-05 , and the followup on 2018-03-23.
I have a few qualms with this app:
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For a Linux user, you can already build such a system yourself quite trivially by getting an FTP account, mounting it locally with curlftpfs, and then using SVN or CVS on the mounted filesystem. From Windows or Mac, this FTP account could be accessed through built-in software.
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It doesn't actually replace a USB drive. Most people I know e-mail files to themselves or host them somewhere online to be able to perform presentations, but they still carry a USB drive in case there are connectivity problems. This does not solve the connectivity issue.
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It does not seem very "viral" or income-generating. I know this is premature at this point, but without charging users for the service, is it reasonable to expect to make money off of this?
It's funny how often that comment—which I made as a 22-year-old undergrad—resurfaces. Someone even reached out to me 2 weeks ago because they wanted to use it in an article as an example of "the disconnect between the way users and engineers see software"!
I like to think that I've gained a lot of perspective over the last 11 years; it's pretty clear to me that point #1 was short-sighted and exhibited a lot of tunnel vision. Looking back, though, I still think that thread was a reasonable exchange. My 2nd and 3rd points were fair, and I conceded much of point 1 to you after your reply (which was very high quality).
Obviously, we have the benefit of hindsight now in seeing how well you were able to execute. Kudos on that!
Congrats on your success! I wish you nothing but the best going forward!