Far fewer people make their living as musicians than did even thirty years ago, and being a musician is no longer a viable middle-class career. Jaron Lanier, who has written on this, has argued that it's the direct result of the advent of the internet, music piracy, and streaming -- two of which originally were expected or promised to provide more opportunities for artists, not take them away.
So there really are far fewer drummers, and fewer, worse opportunities for those who remain, than there were within the living memory of even most HN users, not because some specific musical technology advanced but because technological advancement provided an easier, cheaper alternative to human labor.
Sound familiar yet?