I meant swappable, i.e easily replaceable. A regular user would not solder a new cable, you go and buy a new mouse. For better keyboards it's slowly changing, why don't we see the same for mice then? SteelSeries was doing that, but it should be more common with standard usb connection cable.
Most decent mice already use a connector between the cable and the board, its just not designed to be hot swappable.
The cable finally wore out on my old Logitech G5 and I was able to order a replacement for a few dollars. I also had to replace the skids since they covered the screw holes. All it took was a screwdriver and five minutes.
Oh, I see. Do new keyboards have a micro USB port and you can just get a new cable? I haven't seen this, but I've also never had a cable go bad on me so this isn't a problem I've had.