In that case it might have been helpful if you stated that you were shifting the context away from FTP; as was the context in the GPs comment. ;)
NFS and AFS (from what limited I know of it) are more designed for local networks thus to leverage NFS over a WAN you'd then need to tunnel your connection (eg via SSH or VPN). So while there is obviously overlap between them and Dropbox I wouldn't really say the two are all that comparable.
However to answer your point, I don't think anyone would disagree with the specific part of your point regarding how simplicity is often better than something arguably more powerful. However just because something is simple it doesn't mean it isn't also good. "Good" is just a question of whether it meets requirements. If your requirement is that it can be installed and operated by layman then Dropbox is a far better solution than any other the other proposals you've mentioned.
Yup, mentioned that in my previous post. Awesome project. I remember the first time I discovered it - I felt like a caveman who'd just discovered fire.
NFS and AFS (from what limited I know of it) are more designed for local networks thus to leverage NFS over a WAN you'd then need to tunnel your connection (eg via SSH or VPN). So while there is obviously overlap between them and Dropbox I wouldn't really say the two are all that comparable.
However to answer your point, I don't think anyone would disagree with the specific part of your point regarding how simplicity is often better than something arguably more powerful. However just because something is simple it doesn't mean it isn't also good. "Good" is just a question of whether it meets requirements. If your requirement is that it can be installed and operated by layman then Dropbox is a far better solution than any other the other proposals you've mentioned.