Thanks, this is an awesome article. I've been trying to get a screen recording from AppleTV for a long time. I used a USB-C cable to connect to a 2016 MacBook Pro, and the Quicktime screen recording tip is brilliant.
No replacement will have the Airport's audio output. I use a mini-tos-link to extract digital audio from the Airport to drive a sound system. No replacement will ever have this feature, never mind Airplay as well.