To be able to plugin things like Scaler 2 or 3(I like Cubase chord pads and all but Scaler is so much easier to use. internal MIDI inserts are something to be desired), step seq modulator, arps, VSTi that output MIDI data.
Having to do this funky MIDI or instrument track routing is…funky…unless I am writing a funky song. Maybe I am spoiled with how Bitwig and Reaper handle it?