No worries, and thanks for making me think about it and how to explain it! It is the sort of thing that you take for granted as a specialist and needing to break it down to a non-specialist is a good test of how well you understand a topic!

You had better stock up on those keyboards while they are still around! They might 'upgrade' them! I have a great laptop keyboard (xps 15) that is a pleasure to type on, but the thing I love best is my Logitech MX master mouse. The scroll wheel, you can just spin endlessly with a single flick and stop with a quick tap again! It backs scrolling long pages a breeze!