Windows '98 is so similar to Windows '95 because Apple hasn't invented anything worth copying since 1995.
Jakob NielsenA general principle for all user interface design is to go through all of your design elements and remove them one at a time.
Jakob NielsenOn the Internet, it's survival of the easiest.... Give users a good experience and they're apt to turn into frequent and loyal customers. But ... it's easy to turn to another supplier in the face of even a minor hiccup. Only if a site is extremely easy to use will anybody bother staying around.
Jakob Nielsen