The classical world has a massive issue with the disease of snobbery. Like the whole 'clapping' rule in concerts. People would clap and cheer and jeer all the time centuries ago! It somehow (you probably know the history better than I) got sapped out to have this strict policy where you can't clap between movements or be shamed and mocked for not understanding it has multiple parts.

Or, how 'tab' is the non-musician's music, even though it's been used for half a millennium since the old lute days. The shock I've seen in some faces when I've simply tuned my $50 viola in some alternate way to experiment with new ideas (reminds me of the snobbery from those two asian guys on YouTube).

Eesh, really puts one off. Which is cool because people inevitably fall on people like Keith Jarrett and Tigran Hamasyan