Thanks for all the replies and suggestions. After much deliberation I have chosen Duplicati as my new backup tool for the homelab.
Duplicati ended up on my shortlist, together with Bareos. Bareos had in fact more potential, but I found it too un-intuitive and would have to put a lot of time in getting to know the program (time I do not have or am not willing to spend).
So my compromise is to use Duplicati.
What I like about Duplicati:
✅ Easy intuitive GUI
✅ Easy setup of backup target (I use remote systems via SSH and for some S3)
✅ It just worked out of the box. No steep learning curve.
✅ According to reviews, it can handle slow/instable network connections very good
What I dislike about Duplicati:
⚠️ No parallel backup jobs
⚠️ No on-prem central gathering of backup results (am doing it now via https://www.duplicati-monitoring.com (might change to just mail, not sure yet)
⚠️ No easy way in GUI to see which files were backupped
Thanks again!
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