Real time MIDI recording from a keyboard not in Dorico yet?

Thanks for your reply. I subconsciously assumed that one could enter polyphonic material in step time already, because if that is possible, D would pretty much have to deal with the same kind of problems (different number of voices) during real time MIDI recording as it would have to deal with in real time MIDI recording. I wouldn’t, or course, have to see notation in real time is it is recored, but I’d like to record it in real time.
It would probably be helpful to even have a sketch mode, where one could record MIDI in real time only as a interim snapshot of spontaneous ideas - with a special kind of piano roll/notation display (see below), where rests/voices wouldn’t even have to be dealt with.

If rests and polyphony/voices/rests is the problem, maybe it could be possible to record MIDI in real time, but limited to one voice at a time?