First off, 15 Echo devices are quite a lot...before your switch to Sonos or anything else, have you checked your network speed? It may be getting bogged down by so many devices in your household hence causing dropouts.
Check with you service provider and have them analyze your network system.
I have both Sonos and Echo throughout my home and never experienced any dropouts. For my casual listening, I prefer Sonos over Echo.
Check with you service provider and have them analyze your network system.
I have both Sonos and Echo throughout my home and never experienced any dropouts. For my casual listening, I prefer Sonos over Echo.