I was saddened after installing macOS Sonoma 14.4 that it's apparently been decided that users are unqualified to control these daemons.
A simple example: to fix all sorts of random audio issues, it used to be possible to restart coreaudiod with:
sudo launchctl kickstart -kp system/com.apple.audio.coreaudiod
But that command now returns: Could not kickstart service "com.apple.audio.coreaudiod": 1: Operation not permitted
I've reported this to Apple via FB13601345. So far I've not received any response.[0] https://gist.github.com/felipecsl/5177790
[1] https://apple.stackexchange.com/questions/187983/sudo-killall-coreaudiod-made-it-so-i-dont-have-any-sound-at-all