It basically turned from a 1970’s brown box to an expensive pebble. And Apple still pretends it’s only a single button mouse – keeping up that old idiotic paradigm of fake simplicity.
Some “instruments” have a certain complexity to them: a computer keyboard needs all keys to work. And the Mac OS has been supporting right-clicks for a long time – but Apple still wants users to perceive the Mac as especially “simple” to use.
But it’s new multitouch mouse isn’t simple at all. It takes some training to get it right.