I’m new to Duplicati and I am very happy I found it. Coming from Arq/Windows, I want to test Duplicati now. Long story short, Arq has a lot of unused potential and I have to contact their support regularly, because of problems (which they fix, but Arq is lacking in many aspects. UI. Command Line. Download of selected files. Etc.). Open Source. No proprietary formats.
So, much praise from me! The way it has to be done.