I've definitely discovered less new artists as I've aged. I'm near 50 now and last year only added Röyksopp, and Sleaford Mods, to my regular listening playlist. But I'm also still listening to new stuff by many artists like Aesop Rock, Orbital, and The Chemical Brothers.

I don't follow radio or popular music at all. However if I hear something I like, the supercomputer in my pocket tells me just what it is so I can discover new music that way.