CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. The 14th generation of Lenovo's flagship business ultraportable, the X1 Carbon, looks no different than the previous iteration. But don't let its comfortingly familiar design fool you: The interior has been completely reengineered to make the laptop run more coolly and quietly, and more importantly it's easier to repair. The X
