automatic shifting

Bafang has a five-speed automatically shifting rear internally geared hub that looks interesting. It can be run with either a belt or an extra-strong single speed chain, so that a bike would not require a belt specific frame. See details here...

My wife and I are both in our mid-70's and have been active road bike riders. Due to some medical issues, we're looking for a new e-bike for my wife, and price is less important than function/features. I've done a lot of shopping around (both real and virtual) but I'm having trouble finding...