So, unless I'm missing some settings/configurations, the digital rearview mirror will be useless for me 99.9% of the time. They physics are interesting and not something I would have even thought about but my old eyes will not focus on the digital screen in the same that I can focus on a regular rearview mirror. Essentially, what is happening is that with the camera, everything in the "screen" of the digital mirror is in focus at one particular point in space about 24" from your face. Whereas, with a regular mirror, the focus point is actually 20+ feet behind you hopefully and your eyes aren't focusing at 24", they are focusing on an object 20+ feet away. I have excellent distance vision and have no trouble seeing a (large)bug crawling across the road when I'm doing 60, but now at 55 years of age, I need reading glasses to see my phone easily.
Just something to think about for folks contemplating the digital rearview mirror, either OEM or aftermarket.