We all know the adage about opinions, but here’s my take.
Sonos is a great alternative for whole house listening. It’s robust and continues to add features without leaving any of the old equipment behind (I just got notice they are going to finally stop supporting the original remote they sold probably 10 years ago…) which, for me, is pretty important as an entertainment investment goes. As far as the sound? It’s good enough for having sound in every room, but for serious listening, I have my nuc connected direct to my stereo so I don’t use the Sonos infrastructure for that. But if you want to have music in your house wherever you go and have it sound better than just a little bluetooth speaker or listening using your phone’s speaker as my kids too often do, it’s absolutely fantastic.
As far as working with Roon?
That’s an old post I made where I was streaming unique music to 15 different zones from my Roon core, most of which were Sonos nodes. Your mileage may vary.