Duplicacy for me has been amazing - I use it to backup all of my machines nightly all consolidated into 1 repo that is copied to B2 and it works amazingly. I've restored plenty and have not had any issues.
I'm curious as to why you took that approach. Why not just straight to B2 from each machine? Is it for a redundant local copy of all the backups? If so that sounds like a good idea since restoring from B2 takes ages just because listing the revisions is hella slow for me...
I like the one-repository approach as it works well - it resides on my NAS which is always on and it is a local backup for multiple machines. From there, I replicate to B2 as an emergency copy in the event my NAS (RAID is not backup!) dies or something horrific. I tried to make it future-proof as much as possible too - with Duplicacy, you can easily clone/copy repositories so new hardware migration will be extremely simple. Not only simple with local hardware, but easy to migrate to a different cloud storage as well. Just don't lose your repository encryption key!
