Like the old Plex Mix. Just right click on a track and play “related tracks” if they exist.
I’m thinking about this because PlexAmp already provides related tracks for putting in to the play queue. Why not use the same “special sauce” for more of a radio feature?
I don’t imagine “Plex Mix” will ever return, but an an auto-playlist generated from a track would come close. Choosing any of the various radio options we have now gives you no guarantee at all you will actually hear the song you actually wanted to hear in the mix.