Oh Sonos, you have caused me so much joy and pain. I have multiple wifi access points in my (solid brick) house, because nothing seems to be able to penetrate

Oh Sonos, you have caused me so much joy and pain. I have multiple wifi access points in my (solid brick) house, because nothing seems to be able to penetrate these walls. When Sonos works it's great. When it doesn't, I end up spending half an hour having to reset everything to get my randomly disappearing speakers back. Some are wired, some are wifi, some are on powerline adapters. It's quite a hodge-podge, but none of my other devices have any issues with the setup, so why does Sonos decide to die randomly from time to time? I've gone through the trouble of switching wifi channels, trialling different ones, just to see if anything improves the situation, but there is no regularity in the failures. It either happens, or it doesn't. I also do not appreciate that Sonos is seemingly all about streaming services. I wish local NAS playback wasn't treated as second-class citizen...it's the only way I use Sonos.