Andy Edelman talked about that at York back in April. He asked for a show of hands on how many were really gung-ho on an electronic Kadee-style coupler. No one raised a hand. There were only a few of us in the audience who were even using Kadees. I think it's a matter of market demand. If "electronic Kadees" came with the engines I doubt I'd even use them as I didn't use the electronic couplers much when I was running hi-rail couplers.
An excellent point Matt!
I remember when Atlas can out with their "scale size" Electro-Coupler, many, many years ago. It was designed to with with Lionel TMCC equipped models, but was a complete failure mechanically, since it took EXTREME pressure to close & lock the knuckle, which then later sometimes broke anyway.
The MTH "scale size" electro-coupler looked and worked great on test, but I'm obviously not sure the market is really there. I prefer the Kadee couplers anyway, especially the newer 700 series.