> Someone (Napoleon?) is credited with saying "quantity has a quality all its own"

Joe Stalin, I believe. It's a grim metaphor regarding the USSR's army tactics in WW2.

https://www.goodreads.com/quotes/795954-quantity-has-a-quali...

According to Wikiquotes, this is a common misattribution, and the first known record is Ruth M. Davis from 1978, who attributes it to Lenin: https://en.wikiquote.org/wiki/Quantity