Original AirPlay (which I'm pretty sure, encompassed a bunch of "versions" over time) had a fixed 2 second lag and was designed around wired ethernet playing lo

Original AirPlay (which I'm pretty sure, encompassed a bunch of "versions" over time) had a fixed 2 second lag and was designed around wired ethernet playing long form audio/video. AirPlay 2 seems like a well-needed update even if the user-facing feature list isn't impressive.