A previous poster put it best: high school marching bands are replacing drum corps. That's why I never marched with a corps because my high school was extremely dedicated to our fall shows that it didn't make sense for me to go with another corps. I already have fraternity, I already have brotherhood and bonding, and I already have fantastic music.
It's a shame but for those of us in band intense areas, drum corps doesn't offer us anything that our high schools do not.