Comment by hintymad

That's a different topic. A large number of E8/E9 in Google have been pushed out recently too. The key challenge is continuous growth. High-level ICs tend to become gatekeepers as the growth of their orgs stagnate. What they don't realize, though, is that gatekeeping accumulates debris and resentment over time, and the value of gatekeepers diminishes over time. A high-level IC either has to make things happen every few years, or reset their project by joining a new org, which means risking losing their institutional know-how.