Thank you for this information. Also relevant is RAM, the new ones have the 24GB option.
Are there moments where many instruments are playing, where the CPU would be taxed? I would think using Halion and various other VSTs, sample libraries etc. would add more as NotePerformer seems quite efficient.
Other factors affecting processor would be in editing - condensing, many layouts, flows, switching between parts and full score and so on.
Did you notice any problems with editing? I would hope the MBA-M2 would cope with “reasonably” complex scores, creation/playing.