The teaching at the HS isn’t great and the disciplinary scene is pretty rough. Overall, it doesn’t seem like the educational benefits would outweigh the drawbacks of such a dramatic change in routine and social experience for one year. (He has friends and social outlets now, but HS is its own unique thing, especially coming in as a senior. He’ll adjust to college, but that will be different from HS.)
After reading everyone’s advice, I’m looking into our closest state university to see if they will do dual enrollment. I tried to reach out to them last year for S23, and they never got back to me. But I’m starting earlier for S24 and I will be more persistent. Our closest UMass also says they do DE so I’m going to look into that (although it is more expensive and a bit further drive than either the state university or the community college).
My current thought is to have him take Engineering Physics 1 & 2 and Calc 2 & 3 in person at whichever of the schools works out. And then, depending on the schedule and what sparks his interest and the cost, have him do his ELA/SS/elective classes either DE or online (APs if appropriate).