Everybody lies on exit interviews. You mostly don't want to burn bridges and frequently will need some references. So HR departments have 0 useful information as to why people are leaving and even less about the costs of having developers go.
> Everybody lies on exit interviews. You mostly don't want to burn bridges
Hold on - not everyone does (I offer myself as anecdata). And I am more than happy to burn bridges if I'm leaving a toxic workplace because, well, it's toxic.
