Unfortunately Sonos products sound like utter garbage -- on the level of a Homepod or worse. What the DAC achieves in decent performance is lost in the abysmal quality of their speakers.
Do you mean sound quality, or build quality?
Either way, this is not my experience either. I swapped my several £ks worth of hardware for a pair of 5 gen2 and a sub, put them on stands, use the room correction (which was impossible with conventional hardware) in a room that is utterly pants acoustically and I ended up having as good a musical experience as I've ever had without the ££££. I was surprised how good it sounded when I set it up, as at that time I'd had enough of the audiophile BS, and just want to listen to music easily and enjoyably and forget the whole idea of "critical listening" . It does both, but it would of course always be interesting to know how the 5gen2 units test. My ears tell me that the £1.5k it cost me was a better solution than the £10k it replaced, but I suspect that was largely down to my bizarrely shaped room and sub optimal listening position.
I do wish that Sonos had embraced 24 bit compatibility from the start, but hey, critical listening in a room with kids, a dog, cats etc etc....