I'd imagine they didn't because it was more about the timeline and process of creating it? They did touch on briefly about why he wanted to create it.

> We'd used Roboto as our main font, and we were running up against its limitations. It was originally built to work as both a display typeface for things like titles and text typeface for longer blocks of text like paragraphs. But it was difficult to read Roboto when it was small

Emphasis mine