Why MotionPlus wasn’t built in to the Wiimote

This comes from a recent interview feature of Iwata Asks

“We actually looked into the idea of including a gyro sensor at the very start of the Wii Remote’s development. But the idea was rejected due to issues of both space and cost which attaching a gyro sensor would entail. Right. That’s the sort of size we’re talking about. And let’s not forget that they were also extremely expensive. However, with advances in MEMS technology, they have become smaller and smaller while at the same time becoming cheaper…” – Junji Takamoto, Development Group No.3 of Integrated Research and Development Division