Sonos is fantastic
I am lucky enough to have a Sonos system in most of the rooms in my house, but can confirm that Sonos does not just make the speakers, but also 'Connect' boxes which join to an existing Hi-fi system. In my living room, I have one of theses 'Connect' boxes connected to my Bose hi-fi.
So I don't think Julian has completely abandoned Bose, maybe like me he has added the Sonos to his Bose system.
If anyone is considering buying into Sonos, my advice is "GO FOR IT". Initially it started off in one room, but I have become totally addicted and have , with time, added to other rooms as money has allowed, and all with no running wires all over the house. We find we listen to music and radio much more often than watching TV. It is worth every penny and the sound is amazing !!