A concern with a lot of performing arts is that there's a lot less freedom for experimentation. Take comedians for example. In the old days you could try out new jokes with the crowd at a show and if you went to far or something flopped you'd quickly move on to the next joke and most people would forget about it if the rest of the show was good. Today, basically everything is permanent. That one bad joke hits youtube and now it stands equal to the rest of your content in the eyes of the internet.

It's harder to take a risk with a new song or different show ending because you'll be judged immediately and forever on everything you do. There's a lot more pressure to be perfect at the first performance.