I have come across playlists, and user pages where we have the same taste in Music so if there were a way to message said users to talk about the music we like and share between each other, the Spotify Community could grow even stronger. (This idea came to me when I stumbled upon my music soulmate and have no way of not creepily reaching out to him--having to Dm on another social media site is not as welcoming as doing so on the Spotify app.)
Updated on 2019-09-06
Spotify used to have the functionality you describe, which is no longer present. The discussion regarding this is located here:
Any update on the matter should be posted there.
For more info on how the Ideas Board works, click here. 🙂