When you use Google's migration tool, your current plan will be moved over to the new platform and you'll end up paying just as much as you had before. In the future, you'll only be able to access YouTube and YouTube Music for the same prices. If you pay $12 for YouTube Premium, you used to get ad-free access to all three services, while you used to get both Play Music and YouTube Music for $10 a month. YouTube Music, Play Music, and YouTube have been intertwined for a long time.
