AI features are expanding to all kinds of apps, and it's getting difficult to find a service that hasn't embraced AI. Lately, AI playlists in music apps have been growing in popularity, and it's plausible that we'll see Apple adopt the trend in the near future. YouTube This week, YouTube Music started rolling out a new AI playlist feature. YouTube Premium and YouTube Music Premium subscribers can turn an idea, mood, or genre into a personalized playlist. There's an option in the Library section of the YouTube Music app to create an AI playlist, where you can ask for or type any genre, artist, feeling, phrase, or other suggestion to get a custom playlist suggestion. Spotify In January, Spotify started…