Well yea, that part was me trying to say there's music as good as old stuff being made today; my first paragraph is about the fact that obviously old stuff will persist if it struck gold and became legend. Who cares? Why is that a problem? Just because a lot of money is still being made on the back of old music doesn't mean that there's some huge problem with new music or the way it's made.
If anything, it's another way to point at digital music distribution and the way it's destroyed the perceived value of music. Old music didn't have that problem from the start.
"top 40" music has always, by and large, sucked. Only the good stuff in that popular batch stays around until today; the Beatles, for example, stayed around in the popular consciousness because they were both incredibly successful and trailblazing artists (in some sense or another). Most of what else was popular when they were rising to fame has been lost to time, because they were passing fads, just like how most of today's music will end up. It's survivorship bias to assume that the best music from the 60's all the way to the 90's and 00's (if you like) is all that released, and all that was popular.
Take some time to look, and I promise you there's tons of material coming out everyday that you can find in every single genre, some of which is bound to strike a positive nerve. Bandcamp indie artist or smash hit on spotify, it doesn't matter.