My biggest reason is probably that i prefer to use the same (well known / proven) tools across the line. I don't think Arq brings something to the table that B

My biggest reason is probably that i prefer to use the same (well known / proven) tools across the line. I don't think Arq brings something to the table that Borg/Restic/Duplicity doesn't already provide, besides a piece of software i'm familiar with, and trust. (and trust doesn't come easy when it comes to backup software!) As i wrote, i already use Arq on my client machines instead of the mess that is "TimeMachine over wifi", but when it came to backing up my NAS and server/VPS, i had to look for something else, as Arq is not available on those platforms. My use case would be backing up with Arq from a FreeBSD/Linux NAS/Server to a remote (networked at least) target, and in case of a full restore, i would use the command line as well. I would then use Arq for Mac/Windows for "plucking" single file restores.