I will admit that I was skeptical when I first saw pictures of Lenovo’s new dual-screen Yoga Book 9i. I’ve tried foldables and dual-screens aplenty, and while many are usable, many also have serious limitations. But this is the first dual-screen laptop I’ve ever tried that I could see myself actually buying. And that’s because Lenovo has clearly done the software engineering necessary to make sure it can address many of the somewhat... obvious...