Re: … no hacking is required … ?
The time, cost, effort and risk involved in changing to a different radio platform means it's unlikely to ever happen
Hammer, nail, impact !
There's enough fuss just getting users over to 8.33kHz radios here - to the point where there's even some public money being put up towards the costs for small aircraft. And that' a change where some aircraft (starting with those using the airways) can change without impacting their ability to talk with the older system (25kHz channels) - and so it's been phased in over many years. Given that for some aircraft, a fancy radio can be a significant part of the value of the aircraft, a mass change to something else just isn't going to happen.
And there are procedures to deal with these situations - and they don't require the Outer Marker to be talking to the aircraft .... (sits back and waits to see if anyone gets it)