I’d like to discover alternative sources if you know any. Most written literature I come across in searches are either technical specifications biased from the Bluetooth consortium, or watered down blog spam of the same consortium’s news releases. Very little in terms of critical analysis or observations of user adoption and real trends in the original equipment manufacturers.

For example, all throughout the news releases of 5.X, no one would discuss if any improvements to bidirectional audio sinks for microphoned headsets were implemented or planned. It’s like the consortium is content keeping us all on phone calls with HFP from the 1990s at bitrates of 64kbps, leaving Discord audio sessions sounding like on-hold music at the DMV.