I've seen a few leave willingly to other similar companies before ever succeeding at the current one, or even doing poorly. The qualifications for the next CEO

I've seen a few leave willingly to other similar companies before ever succeeding at the current one, or even doing poorly. The qualifications for the next CEO position seems to be that one was a CEO before, regardless of performance. Much like DC, after a certain level on the org chart, one "fails up".