If the (British) Arts Council give you money, they also tell you how to spend it.
Mozart has written opera, symphony, sacred and chamber music - not to mention his piano and violin concerti.
Taste is changing, style is changing, and players abilities are changing.
So I've never found there was any particular separation between the two cultures at all, musically speaking.
I would like new people with new ideas to come into it and change it.
Most Beethoven symphonies require 80 or more instruments, and the late romantics even more.