Not OP, but my workflow for composition is to sing a new melody, flesh out an arrangement on my Montage, and bring it into my DAW for adding layers, effect chai

Not OP, but my workflow for composition is to sing a new melody, flesh out an arrangement on my Montage, and bring it into my DAW for adding layers, effect chains, etc. I don't think I've ever used a reference track in the 20 odd years I've been making music. Personally I'd prefer Bitwig focus on core DAW features rather than something like stem separation for which there are already many decent dedicated tools (demucs, spleeter, etc.)