I can't really tell the difference between the mixes Spotify has been generating for more than a decade, except that the DJ picks which mix and then an LLM writes some DJ patter to wrap around it. I've gotten a lot of value over the years out of Spotify picking what song comes next when my queue is empty, I've been introduced (or re-introduced) to a lot of good music this way but there is no magic to it, its just a ML recommendation/engagement model like many others.