I've had various airplay devices since college, so over ten years. In house 1 turn the microwave on and airplay would cut out.
in house 2 with new microwave, new router same apple airplay, it would cut out when the microwave turns on.
House 3 again with new microwave, new router it would cut out. But even with a nighthawk router playing from my iphone or wifes the music would cut out periodically on its on. Streaming from itunes directly from a wired server over wifi to the airplay device it would cut out periodically on its own. Tried literally every wifi channel available on these routers, 2.4 and 5.8 ghz wifi. Even occasionally wired in Ethernet and it would still buffer and cut out.
When i got my sonos i hooked it up to the exact same wifi and router as the airplay device in the exact same spot and never once had a single issue with it cutting out, buffering, or flat out stopping music. Even with the microwave on.
i agree they could be faster about supporting services, but they have everything i want, which isnt that much pandora, MLB.com at bat app.