That would be super attractive to me if my ISP didn't have data caps. My personal archive is ~40TB of drives in my primary desktop. Even disregarding empty space and duplicates, it would take four years or more to upload it onto a cloud service without running over my data cap.
I have symmetric gigabit ethernet and have a few TB backed up to deep archive, but if I wanted to backup and restore everything the data transfer pricing is insane, it would be $1800 for 20TB. This really is the only thing AWS is keeping artificially high to facilitate lock-in.
Another option is to drive the data to some place with a fast internet connection and do the upload over the course of a day or two (one time I asked a friend if I could bring my laptop and a hard drive to his university classroom and plug in for an afternoon (I was lucky to know a few of the IT folks there), and I got 940 Mbps upload. It was like heaven!