First Intel, now two-button mice ...
I liked the one-button mouse very much because of its simplicity. Did you ever see computer beginners wondering all the time which button to press? Two buttons are far too complicated for standard tasks like web, email, iLife, word processing.
As long as there was only a one-button mouse from Apple, it forced them to make the UI of their software "one-button-friendly", even if you could use two-button mice all the time. But now ...
The sad thing is that I cannot switch to PCs or Linux (THREE BUTTONS!!!).