Almost everything on computers is perceptually slower than it was in 1983
I wonder how much of this is a result of UI designers deliberately putting tiny delays/animations into their UIs to make them more "usable"?For example, it was a common piece of advice that if clicking a button opens up a dialog box, there should be a brief animation showing the box expanding from the direction of the button, so the user would associate the clicking of the button with the appearance of the box and understand where it came from. This does actually improve usability the first few times it happens, but over hundreds of iterations these tiny delays really slow down the overall experience of using the interface.