Perhaps there are. But I think the one of the many lessons of The Dropbox Comment is that nobody cares about any of these projects until they actually are turned into a product. Many of the ideas behind some very successful services are shockingly simple, in a "I could have built that!" sort of way. But I didn't, they did, and that's why Dropbox printed money.

Nobody? It was a comment, not the consensus of the entire community.

It was a comment that demonstrated being out of touch at the end of the day. HN lives in this bubble of tech enthusiasts where people are a lot more forgiving of poor polish and poor UX because they know and care how things work.

Outside this bubble, rsync and git and cron are not solutions to syncing your files across devices. Outside this bubble, people just want a solution to the problem, not a box of parts to construct their own solution to the problem from 2nd principles.

…Also, people tend to want this inside the bubble too :-)