Today’s WSJ (18 Jan 25) published an article about the App Debacle:
A must read here:
“The $500 Million Debacle at Sonos That Just Won’t End”
If the link above does not work, search using the article’s title.
According to business news sites, there was a bunch of insider selling leading up to the App’s release in mid-May. According to an article on ARS Technica the smart people at Sonos opposed releasing the App in May.