Maybe you're being sarcastic, but if not: I don't see why it would matter to have shadows on Symphony Hall. For churches, I get it, the shadows would potentially block sunlight from coming through the stained glass windows. That's not my fight, I don't attend those churches, but I get the concern.
But a symphony hall? There's no windows into the performance hall, and most performances are at night anyhow, so what difference would shadows make? I realize there are some windows into the upper parts of the building, but I don't recall ever being able to see them as a visitor. I don't get the concern. Please explain. If it was sarcasm, OK, sorry to have asked.
ETA: Ach, wait, they opened up those clerestory windows up top to the concert hall, didn't they? I don't think I've seen them open, but now recall - and confirmed via search - that they opened them up a few years ago.
So I guess there is some shadow point to be made. During the relatively few daytime concerts. Not sure if I'm swayed yet.