Public data leaves some questions. It is unclear that the results show savings from lowering shipping costs, packaging and other savings that arise when music is not physically traveling. It also does not take into account multitasking. For example, if you are listening to music when you're already on a computer, you do not actually use much more power than otherwise.
Currently, researchers do not urge people to go back to spinning records. On the contrary, they want you to think about your energy consumption and choose services that minimize their impact on the planet. They also hope that this can help develop alternatives that are more sustainable without sacrificing the convenience you expect from ringtones on demand.