Computers have changed chess a lot and top level chess is becoming dominated by opening preparation. Our current World champion might be an exception to some extent.
I have been following the FIDE world cup 2017 and this game perhaps violates most of the general principles. Black played 7/9 moves with his knight and finally managed to win! No castling and fancy moves with the kings.
Here is the game:
Whether you believe it or not, people follow leaders. I am not criticizing these two grandmasters as they have to prepare in such way in order to compete in at the highest level. But such games influence lower ranked players so we may see players much further down the rating list playing like this.
It might be a time to move towards some other chess variants in order to avoid this kind of thing. You decide.