This one has a ton of complex incentives. As a manager it's expensive to invest in growing an employee and promoting them. This requires setting them up in the

This one has a ton of complex incentives. As a manager it's expensive to invest in growing an employee and promoting them. This requires setting them up in the right projects, helping them navigate situations they weren't prepared for and ultimately risk if they prove unable to handle it/your promotion case wasn't strong enough. It's only really worth the risk as a manager if people stay with the company for a significant period of time, at least long enough to make it through to promotion. If you see that someone may be looking, then you aren't going to invest in them and will focus on someone else in your team. All this is balanced on the turnover rate of our industry at ~18 months to 3 years median tenure.