As far as I am aware, CCC doesn't work well backing up to a network type drive, which is what CCC would view it as, more than likely.I want to backup to the cloud not make a backup of the cloud.
I think he meant "CCC cannot backup to your Apple Cloud or any cloud storage." Key word missing, there.I want to backup to the cloud not make a backup of the cloud.
You would be better off using CCC to backup an image to local storage for fast recovery. By local that could be an external disk or a NAS. Thunderbolt, USB 3.1 and even gigabit ethernet all have much more bandwidth than your internet connection, and significantly less latency. Also it is sometimes quicker to reinstall than it is to recover when it comes to the OS. Your data however is a different matter. I would still back this up locally, but also sync it to somewhere offsite - dropbox, etc. You can then selectively restore the bits that are important to right now if things go bad and not all of your data. Trying to restore loads of data over the internet is slow, and remember your upstream speed is less than your downstream so backing it up in the first place will be even slower, unless that 500Mb/s is a synchronous leased line. Even then, it's not as fast as local.
Acronis has been a stable backup and cloning solution for Windows. I don't know how they deal with macOS but apps like Carbon Copy Cloner and SuperDuper are hard to beat. As for ARQ backup, keep in mind how long it takes to transmit your data to the cloud and even worse, how long it would take to recover it.
Specifically regarding iCloud.CCC cannot backup your Apple Cloud or any cloud storage.