Just not that important to me to have a mic on my AN side.
I kinda wonder about BAHA. I mean just put a mic in one ear like a hearing aid and run a wire to the other like another hearing aid. I wear MP3 ear buds all the time.
a BAHA is much more than a "mic in one ear". Trust me, I have one and it's nowhere near what you describe. In fact, what you are suggesting sounds pretty similar to the Cros.
I use a MP3 player a lot. And the beauty of it is with the MP3 adapter that attaches to my BP100 (BAHA processor) I don't even need ear buds.
You may be one of those whose SSD doesn't bother them to the point where they want or need assistance (BAHA, TransEar, etc.,) but if you haven't tried it, don't knock it.
I found the BAHA demo to be incredible. One of the things that convinced me that I definitely wanted - and needed - one.
The BAHA is not for everyone, but I for one am very happy with the titanium post in my skull and the "mic in one ear".