Except that your one EC2 instance is a single point of failure, from instance through host through availability zone, and that providing reliable, multi-node NFS is hard (even with GlusterFS).
And you have to resize your block devices to store more stuff.
Well, this is a problem with a lot of ephemeral services hand-spun on AWS. There are also ways of mitigating it on your instances, but those are clunky, too.
Which is why new services like these are always preferable.
This may be a problem for this new service as well, but with windows isn't there a problem getting a network drive to mount without a user physically logging into the machine?
