Earlier quoted context omitted.
United Airlines used to have this back in the days where your seat had an audio jack and a few channels of music to listen to. Channel 9 was the audio from the cockpit. Nowadays you can listen to ATC from nearly anywhere by visiting https://liveatc.net/
I've listened to liveatc.net, and then took a flight in an Extra 330LS stunt plane and got to listen to ATC from an actual headset... ...and I can't understand hardly a word they say. Even having a slight idea of the phraseology from countless hours in MSFS and watching VATSIM streams on Twitch, when it comes to the real thing, they talk so fast and there's so much static that it blows my mind that anybody can unders…
Controller cadence is a bit geographical - the busier the airspace the faster the tempo, and the more important it is to speak up.
AM simplex radio works amazingly well overall for this purpose, and none of the potential technology that could replace it would be as safe or reliable..