I’ve been using Deezer in Sonos for sometime and it has the capability when you hear a song you really like to hit the “heart” button and instantly add to your favourites. I tried Apple Music and this feature was missing… also nowhere to be found in Amazon Unlimited, which doesn’t even allow you to add tracks to Amazon playlists (as far as I can see). What’s anyones experience in Tidal ? Or  Spotify? For me it’s an essential feature and for reasons I won’t go into I’m looking to switch streaming provider