And there is the problem.
I am a relative drum corps baby to a good slice of the folks on here, and I started in 1994.
You didn't have 10 years (or more) of knowing and loving drum corps, sans voice, casting a shadow on the activity post 2004. You just accepted the activity as it was, which is the same thing I did. I didn't care about valves, and grounded pits, and colour guards dancing.
Maybe in the year 2020 you'll be talking about major changes, and someone who just marched 2019 will downplay your opinion.