A million years ago when Sonos and Slimdevices/Logitech Squeezebox were both newish, I was cheap and chose Logitech on price and an open source server. Today we have their devices in 6 rooms, and open source players in 2 more.

Logitech abandoned the ecosystem almost immediately after I started buying into it and I've worried what would happen but the open source community has made these things better than ever. Don't get me wrong, there have been teething issues with Spotify, breakages in service, and any new hardware is all a bit DIY, but I'm glad I chose the open solution.

The community is currently rebranding everything to Lyrion and you can get started without any official hardware. https://lyrion.org/