I am drawing from personal experience.

This is a real thing that happened to me, after a CEO ignored a product that we had worked on for years - yeah why would he have any knowledge it was just the entire reason for the company to exist.

There were 700 interconnected parts, many partnerships, many other businesses, many layers of approval, dozens and dozens and dozens of specs approval rounds that were signed off by dozens and dozens of people.

1500 hours of meetings which you can extrapolate into 10,000 person-hours of meetings and post-meeting analysis.

"My wife doesn't like green". Like 2 days before a critical milestone on a project with 50,000 visual assets.