Comment by zdc1
We need to make it easier to work with client-side encryption. Keys on the devices, ciphertext in cloud storage.
I was using CloudMounter to do this, but the software was unfortunately a bit rough around the edges and didn't feel as reliable and seamless as the other options.
These days I have some hacked together tar + PGP scripts for encrypted backups, but still rely on iCloud + ADP for the rest.