Hi Stelpa! I’m not a core developer, but this is how I understand that Renoise works internally:
The limit of 12 voices is enforced per note column, of which we have up to 12 per track - this should give each track a limit of 12*12 = 144 voices per track.
Depending on the way things are triggered (having the “chord” mode enabled in 2.8, instrument “solo” option in 3.0) will dramatically affect the number of simultaneous voices you can trigger when playing live.
There are additional things to consider when using phrases, which can also have 12 “internal” note columns (pushing the number of voices even higher). But I’m afraid you’ll have to wait for one of the core devs to give you the full details on that…however, I completely agree that we should be able to control these things somehow 