Good Lord, pity the "modern" composer of 100 years ago who was taught that serialism had rendered everything else obsolete.
Let's talk about specific things right now.
First: How many people in the world now open YouTube in the morning to find a song from 100 years ago.
Second: If you see a song from 100 years ago being played at an event, and young people dancing to the music from 100 years ago, are you happy or sad?
Third: Even if few people listen, it cannot shake the value of music 100 years ago.
We do not deny the past, but we must also pay attention to the present.
Otherwise, how can we progress.
It's a good thing to find problems, solve them, and let more people use them.