My perception is that General aviation is mostly stuck in 1950ies when it comes to technology and we might be seeing an issue where the real issue is the limit of verbal communication to be unambiguous enough for modern standards.

It would be fairly easy to replace the whole hear/repeat with an system of unambiguous text messages using hardware not much more expansive the cost of an tank full of avgas for the average plane but it seems like people still try to solve this by regulating the already crowded radio frequencies with more verbose instructions.