I would pinpoint this:

Our research does not reject the notion that individual behavior and decision-making may directly relate to upward economic mobility. Instead, we narrowly conclude that biased decision-making does not alone explain a significant proportion of population-level economic inequality

It was kinda obvious to pretty much everyone but it's still nice (and important) that there's an actual study confirming this.

It's nice that neoclassical economics is now verifying with their methods what we know since... the 1830s maybe?