A high-end 16-inch business laptop, the ThinkPad X1 Extreme G4 is the non-workstation version of the ThinkPad P1 G4. Unless you need that model’s Xeon CPU, ECC memory, Nvidia RTX A-class workstation graphics, or ISV certifications, the ThinkPad X1 Extreme G4 is a more economical option and still offers a high level of performance.