One more possibility - use both USB-MIDI and hardware MIDI (from the TRS jack) on the 16n.
You’d need a TRS to DIN MIDI adapter and a DIN->USB-MIDI adapter.
So - USB-MIDI out connects to one norns. TRS MIDI out connects thru the adapters to the second norns. Use half the faders for one, half for the other. Manage MIDI mapping on each device since you’d still receive the MIDI from the entire 16n
For the previously mentioned route of using 2host - I was going to suggest using aconnect to create a routing at the system level (to pass 16n to twohost)…
But… that won’t work. It appears you can’t make aconnect connections once norns is running (matron I believe).
10.0.1.21 ~ $ aconnect 20:0 24:0
Connection failed (Resource temporarily unavailable)
@tehn is there something specifically blocking aconnect from matron? If I make an aconnect connection before norns has fully launched, matron will stall out, things go non-responsive and the display will be completely blank. Once the aconnect connection is broken/disconnected, everything returns to normal.