pipewire doesn't let devices sleep when audio isn't in use causing issues with battery powered devices
Pipewire doesn't let devices go to sleep causing power management issues and stopping devices from going to sleep. This in turn stops entire subsystems from going to sleep.
On my Lenovo Thinkpad X1 gen9 the realtek codec runs at 100% according to powertop which in turn stops i2c buses going to sleep. If I add in USB audio interfaces the USB bus connected also can't sleep.
On battery powered devices this causes quite a large reduction in possible runtime.