As a part-time group fitness instructor (full-time software dev), I use iTunes to create and organize playlists of varying lengths for the classes I teach, and

As a part-time group fitness instructor (full-time software dev), I use iTunes to create and organize playlists of varying lengths for the classes I teach, and to make variants of some of the playlists, i.e. for a little more variety when revisiting past material. I find it to be both a useful and frustrating tool for that purpose. On the whole, I feel the interface has gotten more clunky over the years. However, I no longer have to worry about syncing devices as I (finally) figured out the iCloud Music Library feature; now, I just create/alter/delete a playlist on my laptop and then my iPhone, iPad, and iPod automatically pick up the changes. If there's a tool with a better interface that will seamlessly integrate playlist curation across my iOS devices and macOS laptop, I'd seriously love to hear about it.