A Big Knob Passive (not powered), which can toggle audio independently between two inputs (laptop and pc), and two outputs (speakers, and bluetooth transmitter) using tactile toggle buttons with immediate response, and it also has a big volume knob, and a button to turn stereo into mono which has turned out useful for some badly encoded videos having audio in only one channel.

The Bluetooth transmitter is used with sony WH-1000XM3 using the aptx standard and latency this way is good enough for gaming (I know what bad Bluetooth latency is like, and this setup does not have it)

The fact that pc and laptop output to audio jack and don't know I use wireless headphones (or which input or output I use at all) is a feature, not a bug, since I actually don't want the headphones to be able to change state of music players or volume on the pc as it's buggy and annoying if it does that.

The only thing the big knob passive lacks imho is an ability to mix both input sources together passively.