2D printers were more than 15 years early https://www.pcworld.com/article/485139/counterfeit_money_on_color_laser_printers.html
The biggest difference between 2D and 3D printers other than a dimension, is their complexity. People can make their own 3D printer, so trying to regulate it is absurd. With 2D printers, the governments just have the handful of printer manufacturers build the restrictions into the machine and it's much harder for a random person to get around.