Squawk:
Every single manager where I work has been promoted from internally and that has been the case for over 100 years. It works really well ! But as a manager, what would I know ! ??
Then you are very lucky! The normal situation is that senior management has a “use by” date or the organisation is set up to deliberately burn people out and discard them or the management is replaced when the strategy changes.
I was once asked to take on a GM’s job for a certain company. The incumbent, the directors told me, had successfully pulled the company through the 1990 recession, he was a cost cutter. “But now the economy is expanding, we want a new GM who is a business builder” the Directors said to me. -So that was the managers reward for successfully navigating the recession; to be fired and replaced with a salesman. I didn’t take the job.