I'll check nts out. Although it's not super developed yet, I do intend for lagukan to handle unstable preferences. It already kind of handles different sets of

I'll check nts out. Although it's not super developed yet, I do intend for lagukan to handle unstable preferences. It already kind of handles different sets of songs--i.e. it doesn't think "You like song A," it thinks "You just listened to song A, and previously when you listened to A you also listened to B". So it can adapt based on the songs in your current listening session, although it takes a while for it to learn the different sets. I'm planning later to make it adapt to preferences changing over time and also contextual factors like working out. There's a lot of good research on context-based music recommendation.