> Through the use of replication instances can be resilient and recover damaged data from other nodes

I sure want this. Setting multiple nodes might be cumbersome, but it should be worth it for important data.

Also, the use case you are presenting is for overly casual cases. People just caring about their photos could use Flickr or just about any random photo service with a private setting.

Dropbox users are already a step or two further down the line, and there are files like password databases (keepass databases for instance), and other sensible things you'd want to synch seamlessly but wouldn't want to be accessible to anyone else, even with just a warrant [0]

[0] I think you still can refuse to give a password if I'm not wrong