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Laptops are an ergonomic disaster. I used to be a disability officer, and the vast majority of back and associated problems my students had were due to their use of laptops. As someone whose idea of a computer is a perfectly stationary, well-set up desktop computer, I've always found it odd that people primarily want laptops, which to me are for special applications, but obviously many people are so much on the move that mobility to them is a priority. Still, you shouldn't use one for a great length of time without a separate keyboard and some kind of stand that means the screen is at the right height. Obviously, it's then difficult to make sure the screen is the right distance away as you have to take account of the keyboard in front of it.
I think you can get laptops with detachable screens now, is that right? In that case, it should be easier to set it up ergonomically by separating the two (and no need for an additional keyboard).
You're right, that is outdated. It's because of the way older, non-GUI operating systems worked. Updated advice is that you should look at the middle of the screen.