Dissonance and consonance are universal. You still have classical music, rock & roll, metal, techno, pop, etc. Even in the world of classical music, there are different waves and composers stretching the limits of the framework around them.

We are training the users into enjoying very rigid and professional looking websites. Anything amateur looks jarring these days.

This wasn't true in the 90's - we trained the eyes of the users into disliking amateur looking websites.