"You need to impress the hiring manager in 10 seconds" - I think this is a flawed view. The word "impress" does not apply here. The CV just needs to be good enough not to be thrown out. You don't get hired based on the CV. The CV is just looked at to select the people who start the interview process, to hire 1 good person in the end. Once you're in the loop, the CV is mostly irrelevant, you'll just do the loop, and get hired (or not) based on your performance in the loop.
It's like democracy. It's not a perfect system, but it's the best we've come up with so far [that scales beyond small teams].