>I did install some speaker wires, but the times when I wanted to play music in one room and hear it in another are just about never.

I have speakers around my house, including on my deck, wired to a stereo receiver for music and I do use it. But Sonos didn't exist when I had the various renovations done when the wiring was added. If I were doing it today, I'd almost certainly just go with some sort of wireless system.