Take as old as time…!
However. There are also old timers who refuse to delegate, only ever giving mindless tasks and not training the new folks to be self-sufficient. “They would just screw it up, it’s better if I do just do it, it’s both faster and better.”
You could argue that’s a leadership problem as well, of course, but my response would be that if you’re the only one who understands a system, you are a leader, and leaders have a responsibility even if they aren’t managers by title.
Hear, hear! Anyone who has on-boarded to some legacy system has probably experienced this from one end or the other. The trouble seems to be in getting the heroes, as it were, to recognize that they have a responsibility to properly on-board and train, while simultaneously getting their managers to give them the space to do this work and properly prioritizing it (while also helping to keep the fires at bay... Easily 50% of the on-boarding challenges I have faced in my career were because the person who was responsible for on-boarding me was constantly fire-fighting by themselves).
Hah, just observed something similar in a different team. They brought a teammate from overseas for training for a month and during that time none of the old timers interacted with this guy at all. Once this teammate returned they were all mumbling how he doesn't know shit. The same old timers are constantly ranting about being the only ones doing weekend maintenance :)
The hypothetical person in question gets a leader's salary, title, and responsibility, right?
We're not expecting them to hold up the sky for free?
[waits for audience laughter]