[Slikey]

This is just demonstrably not true. Bluetooth Hands-Free mangles the sample rate to 16 / 24 kHz. See this video for a collection of pretty much all common devices from "this decade". https://www.youtube.com/watch?v=ifmGS_WWk7o

[runako]

Saving others the time: this link doesn't cover any Apple headsets.

[read_if_gay_]

My AirPods reportedly sound like shit on calls and the same is true for any AirPods [Pro] user I've been on a call with.