You have a backup on every device you choose to sync and if one of these devices happens to be a server with a copy-on-write file system like btrfs[1] i find it very unlikely you will ever loose those files to corruption or a single point of failure.
> i find it very unlikely you will ever loose those files to corruption or a single point of failure.
Unless you happened to live in New Orleans in 2005. And really of all that sounds like a lot of work to set up and maintain for the near zero chance that some government type wants to spy on me to look at harmless and boring pictures of my pets and family.
[1]https://wiki.archlinux.org/index.php/Btrfs