I made a surprising find on Spotify not so long ago. One of their curated playlists - Techno Bunker [1] - algorithmically mixes from track to track, like a fairly competent DJ, and it does it even if you turn on shuffle. There may be others, but this is the only one I've found so far.
This is amazing, and I'm surprised this isn't noted down in the playlist description, nor anywhere else. It doesn't simply crossfade, it matches beats up much like a human would. This is insanely neat and such a nice find.
I am not hearing this -- I'm hearing 1 to 2 seconds of silence as one song ends and the next song starts.
In my spotify preferences I have "Crossfade" disabled, but there is now a new setting that I haven't seen before: "Automix -- Allow smooth transitions between songs in a playlist". This is enabled.
[1] https://open.spotify.com/playlist/37i9dQZF1DX6J5NfMJS675?si=...