Canon serve up EOS-M cold turkey

No, the question in not "why".
In fact, there is no question.
It's just a lot of blah-blah from people who should have a life.

Canon released a new camera. If you need it and if you think it's good, you may buy it.
If you don't like it, take a hike.
It's simple.
Canon knows much more about cameras than you do...