Wireless headsets - great idea, if they work. I’ve found they work about half the time when the ground crew are positioned at the wing. You’ve probably heard that ‘headset connected’ annunciation being repeated over and over. That’s the headset losing wireless connection and re-making it. Theoretically the headset has the range to work from back there at the wing, but if you ask the groundcrew guys about it they’ll tell you it only works if the headset battery is fully charged, and after they’ve been using it on the ramp for a few hours the battery runs down, the signal weakens, and those comms drops occur.
If they don’t have enough backup sets to keep one on charge while the other one is in use the system is unreliable.
So it comes down to money again.