This was what everyone said was the reason for wrecking Linux with PulseAudio, all those years ago.

I've still never cared and don't know why I should. What am I missing? I've used systems with that, but never bothered to try using it because... why would I? Every media player has a volume control, YouTube has a volume control, every game has a volume control (usually multiple, for different types of sound), and 99% of the time I just want everything at about the same level anyway. The last thing I want to do is have another place a given program could have its volume set or muted or whatever, so then I have another place to look when it's not doing what I want. One per-program (built in to the programs) and one global is quite enough.