I'd forgotten there used to be a whole discipline called HCI (Human-Computer Interaction) which seems to have largely disappeared now, at least in a commercial context

I am reminded of the HCI lecturer at university whenever I use something other than my usual KDE desktop.

With a maximized or suitably positioned window, pushing the mouse all the way to the right of the screen activates the scroll bar. To the top right activates the close button.

Small things, but they become annoyances when they are missing.