I have been retired 10+ years but still work with a few schools. The middle schools I work with were not allowed to go to elementary schools to recruit so numbers of beginners were half what they were pre covid.. High schools I am familiar with dropped some because students didn't rejoin band, of couse lack of beginners will eventually affect HS programs fir a few years.
As for current marching trends, My thoughts are, yes too much emphis on marching. Itís great to watch at state marching contest, but I canít imagine an audience enjoying a show about thr stages of life for a whole season. And I think no doubt it turns off many students who may want to succeed in music but donít wish to spend every werkend at a marching contest. I doubt that I would have entered the profession if. marching band was like it is today when I started!