I got a question for y'all

Do you separate songs into playlists or stuff them all into liked songs?

My dormmate said that most people do the latter and that's it's "more psychotic" to group them into playlists. I think i remember hearing about a study like that but can't find it. Direction would be great.

So yeah, playlists or liked songs? And can someone point me in the direction of a study like that?