I don't "do" betas, but am most interested to see the release version...
According to Mike Bombich's recent
Blog:
"CCC 4 will be qualified on macOS High Sierra, but the majority of our APFS compatibility support is going into CCC 5. CCC 5 currently offers bootable system backups from APFS to APFS, HFS to APFS, and APFS to HFS. Additionally, APFS encryption is supported for both source and destination APFS volumes, as well as for remote Mac source and destination volumes. You read that correctly – CCC 5 can automatically unlock and mount your APFS-encrypted volumes on a remote Macintosh, and do so while maintaining the security of your encryption key in a keychain."
