Currently I use:
Services: Netflix and Spotify. Tried Apple music but dumped it due to having no web player for use at work, or Sonos interface (yet).
HP ML115 server running Windows 10 and Plex (for media collected before my streaming days)
Samsung Smart TV and PS4
Cambridge Audio stereo amp with Monitor Audio Silver speakers
Sonos x 3
And there is the rub. Sonos. I have no way of piping the TV/PS4 sound to Sonos (ok, maybe somehow with a lag). Spotify provide a crap API (I think), while Sonos refuse to allow Spotify Connect to directly send music to my speakers.
The worrying thing is, the more of these walled garden, monthly fee charging companies that are around, the more likely you'll need to subscribe to many of them to watch what you want. This encourages piracy by making stuff difficult.
Similarly, when a service provider decides to not play ball with another, it leaves the user no choice but to switch to a different service. Not so difficult with music, as most of them see to claim millions of songs these days.
So, I'm tempted to sell Sonos and see what happens with Google Chromecast Audio, or one of the Spotify Connect devices which will no doubt be much cheaper than Sonos.