Is Old Music Killing New Music?

...the same generation using up the planet's resources, spreading consumerism everywhere, and keeping housing and healthcare unaffordable for younger generations is also quite ok with keeping the airwaves to themselves. 

I'm not sure where to look it up but my guess is that current artists rake in a lot more money than older artists. Record companies are not in the business of supporting new artists, they are in the business of selling product. Nothing has changed except the delivery system and huge social media platforms.

The artists are complaining that they aren't making enough money on the digital services AFTER they sold the rights to their music for huge lump sums...

Think any current group will break the record of Dark Side?  How much current music will be around in half a century?

Very good point. One of the very few bands that has people successfully playing their music. Aussie Pink Floyd and Brit Pink Floyd are selling out shows.