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…
That even holds true for everything but the smallest of jazz combos. Could you imagine listening to a group of 20 musicians all playing from Fake Books? It would be a mess of noise.