I found this thread by googling 'considering selling Nerdseq'.
I've had mine for many years, and while it's very capable it's complicated and confusing. And horrific for input in my opinion. I've been waiting years for the USB expander with the latest Novation Mini Launchpad sitting in a box ready for it, but I'm tired of waiting and tired of being frustrated with it.
Now that Digitakt has song mode, I think I might sell the Nerdseq and use the Digi alongside something like the Endorphines Shuttle Control.
It's kind of sad to let it go but if I'm honest with myself, I'm just not happy with it at all, even though it's the best 'in the rack' sequencer available. I just hope I don't regret it!