This is a good way to save $99.
Apple has apparently integrated a new policy wherein when you buy a new Mac at an Apple Store location, they’ll migrate your data over for free.
Previously, this service retailed for $99.
Data migration was originally part of Apple’s One to One program. This was a training program offered at Apple retail stores. Through this program that cost US$99/year you could learn more about your Mac and get assistance from an Apple retail employee. The program was shut down in 2015.
For more knowledgeable users, macOS features a built-in Migration Assistant that allows you to do this on your own.
Via The Mac Observer and TidBITS