Home Assistant Connect AUX-2 gives your old speakers and TVs a second life for $69
(www.androidauthority.com)
Chromecast Audio was such a cool thing that they just killed for no reason whatsoever. Chromecast was a thing, you could cast music, there was no deprecation needed.
It's been years but I have one of these home assistant ones (A different model) and it's just like the Chromecast Audio was.