Hello, I have an iPad PRO 12.9. It is good for pdf annotations and note taking. No doubt about it. However, I cannot use it to replace a laptop. Now I am considering a Thinkpad X1C6, 2-1 X1 Yoga and X1 Extreme. For those who have used iPad and 2-1 Windows laptop, how is the pdf annotations and note taking abilities of 2-1 Windows laptop compared with the iPad Pro? I try to reduce the total weight of things that I need to carry. Thanks.