AdamJay
Correct. Poly mode on MnM is all or nothing. You get to poly one track and use no others while its in poly. However, you can use it as a creative tool, as you can select in realtime which track to poly, so the feature can work like a solo function if you like.
There is another way to get polyphony out of MnM, though. There is a DigiPro Ensemble machine (DENS) that will allow you to build poly chords in one track from a single waveform in the digibank (useable on Mk2 and Mk2+ models).
Good luck programming a Tetra without a computer. And if you don’t mind using a computer to program it, then you can use your computer’s midi sequencer as well! 
I haven’t got a computer, mine packed up the other day and you don’t need a computer to programme a Tetra I understand.
But in all seriousness, the very FREE Oxford Overdrive and Immortal Waves digibanks turn the MnM into a very convincing and inspiring virtual analog. I’ve assembled my own digibank with a variety of waves, and all my deep baselines lately have come from using waves from
I do like the sound of the Monomachine and those examples sound really nice but not really analog, to me anyway.
Or record them with an Octatrack, and hey there’s yet another great midi sequencer than Elektron makes!
Well I could sample but that wouldn’t help for synth layering really. Also I don’t need an Octatrack to be able to do that even if I wanted to.
A4+MnM is a great combo. My favorite 1-2 punch, in fact.
Why only one Elektron?
Expense mostly. I can do everything at the mo using the mpc sequencer and an Analog though would rather lose the mpc if possible for less gear lugging.
Also something feels off about compensating for the midi inadequacies in the Elektron Analog by having to buy an additional Elektron. Doesn’t really sit right.