Thanks for leaving a comment Walt, as combative and denigrating as it may be.

Albert Einstein reportedly said, “Every problem should be simplified as far as possible, but no further.”

I made a simplifying assumption that mobility isn’t a major factor, which made the analysis far simpler for me to do, and for others to read and digest.

There is a possibility that I erred, simplifying “further than possible.”

I’d be intensely interested in reading an argument that proves I indeed erred in that way, supported by the diligent, well-substantiated research you must have done to conclude I was lazy and wrong.

If you do write (or even find) such research, please do post a link here. I’ll be the first to read it, clap for it (if it’s on Medium), admit I was wrong, and make any corrections called for.

Lacking any such, I’ll just disagree with you, and maintain that my simplifying assumption is plausibly valid.