Something that bugs me today is the way music education was handled at my school, and probably other schools. I got to a pretty good technical competence with my trumpet but at the end of the day I could only play what was on the sheets. Maybe some of that is my bad, but I switched to keys after highschool and when I show up to jam, most wind players seem like musical cripples without a lead sheet, and my fakesheets…
I also played brass, for what it's worth, but never felt limited by breath endurance. I was a ~5:00 mile runner as a 12 year-old, though.