As you know, in many cases being a BA student where BM’s are offered as well, will mean lesser opportunities versus the BM students but there are exceptions. I imagine Bard would be one since jazz is not in the conservatory.
I wonder if your son will end up doing a BM. There are so many good programs affiliated with both LAC’s and universities.
Posters here have made the point that majoring in music can work out in many unexpected ways 