Earlier quoted context omitted.
Alexa-powered does not necessarily mean Alexa devices made by Amazon though. For example: I own a multiroom speaker setup not made by Amazon that is Alexa-enabled, all speakers could run Alexa if I had set them up for it (which I won't, ever), and they're very likely counted on this metric. I can remember a multitude of other speakers and devices with an Alexa-enabled badge on their packaging that aren't made by Amaz…
Assuming you're referring to Sonos -- while they were once the best, they seem to just not work well anymore. I'm lucky if I can get it to function correctly. I've observed my brother's Chromecast whole-home audio which cost him a fraction of the price and has a ton more variety - and I'm thinking I may ditch my Sonos setup.
What issues are you experiencing? Wonder if it’s something I can keep a look out for.