I found this line astounding and not in good ways.
When a new senior person is announced (even interim), the first thing most people do is ask "what has this person done?" and they scour LinkedIn, writing, social media, etc to understand what they're about and their background.
I'm trying to imagine senior leadership's reaction on the initial news and during that 4 months. Even if the interim CEO busted her butt, just about the time she has an understanding in the company, team, etc, she was on the way out.