A little known fact about it is one of his replies is this:

we're in a similar space -- http://www.getdropbox.com (and part of the yc summer 07 program) basically, sync and backup done right (but for windows and os x). i had the same frustrations as you with existing solutions.

let me know if it's something you're interested in, or if you want to chat about it sometime.

drew (at getdropbox.com)

https://news.ycombinator.com/item?id=35103

I guess no one managed to top that comeback in the last decade (thread is 3600 days old!).