The reason people talk about the mouse is that it's one of the worst ideas they ever had.
At the time, I remember someone claimed that the reason was that they were afraid people could leave it plugged in for convenience. Apple thought that would lead to a worse experience because their mouse was designed to be used wirelessly. I think it was actually more related to aesthetic "icks" by the designers, because people would have disconnected the cable if it was in the way.