I'll add some to the list: - Control external monitor sound volume. There are buggy paid and open source solutions, but they all trigger all kind of bugs with sound and macOS itself. - Capture game audio with OBS together with microphone input. - Being able to wait for files to copy and work Finder at the same time. Yeah I could find replacement for Finder, but why the hell? - Use Valve Proton. Yeah, Linux is great t…
You can use macOS’s Audio MIDI Setup app to control the volume of each sound channel separately. Not easy to find, but it is built in.
I'm sure there are more uses to be found but that was the most immediate I found.