Well, for basic functionality, there's location tracking while in the park, plus demographic info and your listed preferences for at least nominal customization

Well, for basic functionality, there's location tracking while in the park, plus demographic info and your listed preferences for at least nominal customization (though some Youtuber experiments have suggested it's pretty bad at that). A huge number of people in Disney parks are location tracked constantly anyway because they use MagicBands, which have some kind of specialty extended-range RFID (along with the normal tap-range RFID functionality) that's used to automatically monitor ride throughput and general traffic in the parks.