Sonos devices on average consume about 5 watts each if idle. Having 5 sonos devices around this means 25 watts on average idle consumption. Over a year this is about (25x24hx365) 219 kwh. In Germany where 1 kwh is about 0,30 Euro Cent this then means about 70 Euro (about 100$) just to maintain an idle system. This is just too much and could easily be reduced. Looking at the environmental aspect this gets even more critical: There are around 2.5 million Sonos devices around. This adds up to 110,000,000 kwh or 110 million kwh.