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I switched over to NZBGet. @trustyfox or @The Creator convinced me and notice it speed much faster at unpacking and getting things moving. A few years ago, NZBGet always crashed for me, but that was using windows.
I used Sab for a long time and had no issues maxing my connection 24/7, but it’s not the most efficient option and you tend to need to tweak it to play nicely, it works though. Try both and see what you prefer (same with the rutorrent/deluge/transmission debate).