End of an era: the Lenovo ThinkPad P16 Gen 3 doesn’t have a Magnesium structure frame The ThinkPad P16 Gen 2 was the last of its kind. With the newest model, the ThinkPad P16 Gen 3, Lenovo finally lets go of one of the most defining designs ever created under the ThinkPad name: The dedicated Magnesium structure frame, which was introduced with the ThinkPad T60 back in 2006.