Whenever I add a new playlist, it ends up at the top of my list of playlists. (That doesn't seem to be the case for everyone, but I assume it is for most of us now.) Overall, I prefer this to them ending up at the bottom, BUT there are a handful of playlists that I always want to be able to access easily, and now they often get buried in all the new lists I'm adding.
My workaround solution is to put these lists in a folder which I try to remember to drag to the top of my playlists whenever I add new playlists. Needless to say, I often forget. It would be SOOO much better if I could pin these few playlists to the top, so that new playlists ended up immediately below my chosen few.
This idea has already been suggested here:
Add your kudos there please! 😉