Doesn’t surprise me… was initially intrigued when Spotify opened up for 3rd-party developers a few years back, and while I’ve installed and used a few of those apps, I’ve not been an active user. I am, however, active using both the Spotify desktop client and the Spotify mobile app. Further, I am active using Spotify via the Sonos app.
Appears the latter – extending Spotify via API access – will be the focus moving forward. Sounds right.