If AirPlay 2 really is cracked, and will work soon in shareport-sync on Linux, that is pretty exciting for me. I have been really enjoying pushing all my audio from all my devices (iPhone, two iPads, and a MacBook Pro) to a single Linux server, running shareport-sync, connected to my external DAC/Amp. Uncompressed audio goes over the network via the AirPlay 1 protocol. AirPlay 2 is better for multi-room audio, and has a shorter delay.