Sure, but if I’ve got a2/a3 samples, then I might want to avail myself of them; a sample of multiple instruments playing in unison is likely to sound more realistic than multiple solo samples playing simultaneously, and it would require fewer resources of my computer, as a bonus. In any given library, there might even be sounds that are available only as multiple-instrument samples.
I just figured it might be nice to take advantage of Dorico’s condensing capabilities by scoring all of my wind and brass parts on solo staves. Support for a2/a3 samples under this approach in playback is just a thought, really; it’s not something that I would consider so much as a medium priority item. I was just wondering how anyone else felt about it.