That's probably where Dropbox sees itself headed: the corporate office suite space Microsoft currently dominates. I don't think Dropbox has much of a chance there. There was a time when Microsoft was in a shaky enough position for someone to knock them down, but then they got a new CEO and convinced people to take another look.
And ugh, hanging punctuation is just a bad novelty that is of dubious value in prose, and strongly negative value in other forms of content. I believe it has no place in something like Paper—it feels to me like one of the developers came across the concept and thought “that sounds cool, can I make it work in Paper?” (and did a decent, though not brilliant, job of it, I admit) without stopping and thinking whether they should do it.
Oh, and Paper is so slow to load, just like Dropbox is these days. I only open either when I have to, they’re so slow to load and resource-heavy.
Is this the second attempt?
I'd prefer it if they just made file syncing easier.