I make frequent use of large playlists in Spotify and Apple Music. Some have several hundred tracks, some have several thousand. Those services have no problem playing/shuffling these playlists within 2 seconds or less when using the native apps. But when trying to play any of them in Sonos, not only is there almost always a considerable delay playing even medium-sized playlists, but larger playlists pretty much never load and instead give an “Unable to add songs to the queue” error, requiring me to resort to Airplay and rendering the Sonos app completely useless.

So my question is this - what is the actual limitation Sonos is running up against here? Is there a specific track count limitation, or is it a time limit? I see both answers posted with authority here and elsewhere, and really want to get to the bottom of it.

FWIW, I have gigabit internet and my internal network is based around a well positioned Eero 3-unit Pro 6e system which provides a minimum 160mbps in even the most remote corner of my 1,500 sqft home. I also have the Sonos Boost unit hardwired into my system, which I am now questioning the value of.