I joined Meta as an E5, and now I'm looking to get to E6. I want to stay on the IC track, so my goal is concretely to get to E6 and stay there, not become an M1. I know that leadership is crucial for EMs, but is it the same for staff engineers at Meta? I'm currently leading <5 engineers who are probably E3/E4, and I'm wondering if I need to expand my leadership scope there.