[Lost Sheep]

I wonder if any manufacturer (or electronics hobbyist) ever made a device like this:

It would have a male and female 1/4" jack on each end.

Have a "mute" button on the side

The 1/4" male end would plug into the instrument output and the female end accept the 1/4" male cable that leads to the amp/mixer.

Such a device would be able to convert any ordinary instrument cable to a mutable cable (if/when the cable needs to be replaced by another - e.g. different length or cable failure).

For someone who does not use A/B switches or tuning boxes on the floor, this would be an alternative to buying a dedicated mutable cable (which has more failure points than the device I envision). Sure, it has an additional interface, but I think that is a small sacrifice. One advantage is that when the player grabs the cable to unplug, the mute button is right there at the player's fingertips (for those players who sometimes forget to use a foot pedal, the button under their fingertips is a reminder to "mute" before unplugging - plus the button is right there).