You're right, I do think Spotify connect is an absolutely killer feature that I'm surprised it hasn't been replicated by other companies. I'm a fairly happy Apple Music user but that's definitely one of the things I miss about using Spotify. It's truly bizarre for Apple who has fairly good integrations and Music continuity just makes sense.

Spotify Wrapped is also kind of a cultural phenomenon. People enjoy sharing and talking about it and I guess it's the default assumption that you're using Spotify so you can easily share playlists and stuff to other users. Spotify has the network that smaller services don't.