Apple TV 4K + AV receiver with HDMI control turned ON + a set of 15 years old speakers with 8" woofer would be my personal definition of "AirPlay 2 speakers". By keep updating the Apple TV it could be Airplay 3 speakers.
Maybe a HomePod or two for the living rooms, but that's it.
Wouldn't touch any of these craps knowing that those companies could stop supporting so-called speakers, and rendering them useless with a very limited lifespan.
I have seriously considered going back to wires for legacy speakers once the Airport Express units die. Manufacturers seem only to be interested in selling 'Smart' speakers.