Just a side note: I hoped AirPlay was stable after so many years, but everyone may already know that AirPlay 2 is a change that at least in my use case, made all my old Macs running older macOS and AirPlay 1 incompatible with newer third party hardware and hardware that updated firmware to AirPlay 2. Yes, I'm talking about iTunes! At least all my Airport Expresses still work fine! lol