I get the reason, but don't think it's similar. (And, AFAIK, Dropbox uses nginx to share files.) Yet, article clearly said this is not a product, but a set of

I get the reason, but don't think it's similar. (And, AFAIK, Dropbox uses nginx to share files.) Yet, article clearly said this is not a product, but a set of protocols. So I was wondering what's the point, if the protocols (HTTP, WebDAV) are already there for a long time, and even have native support and can be easily mounted as local drives in most modern OSes. I've missed the encryption and signing bits. Sorry about that.