Earlier quoted context omitted.
Why do they need to expand beyond that? Am I idealistic to say a company can survive just by doing something really well. Salesforce is hardly a paragon of a well-executed clear and consistent vision. I pay Dropbox because I can rely on their backups any place at any time, not because their storage is cheap.
The main problem is that, if they wanted to, it shouldn't take Apple/Microsoft/Google/Amazon too much work to put out a comparable product and offer it for free. As an anecdote, my girlfriend already cancelled her Dropbox account because iCloud provides what she needs at a much cheaper cost. Personally, I require Unix support and also use a large portion of the terabyte of space, but I'd bet that the majority of user…
I worked on SkyDrive/OneDrive for a few years. That's what we thought too. This stuff inevitably starts out with "seriously, how long is it going to take to make essentially a wrapper around rsync" and ends up with "Hey, guess what happens when you cross filesystem errors with distributed systems errors when dealing with unmergeable files?"
This is a deceptively challenging space, particularly if you want to do sharing and group work in a reasonably intuitive way. Which is why Dropbox has managed to remain a company instead of simply being eaten up the first quarter that appl/ms/google decided to get into this business. Note that all three have an offering, and at this point I know that OneDrive is actually pretty good, but for years it was kind of an uphill catchup struggle.