As much lip service and actual strategy organizations invest in "retention" efforts, it's less and less clear that talent wants to be retained.
Talent wants to be engaged. Talent wants to feel valued. Talent wants to grow. It doesn't necessarily believes that any one place has all the capacity to make optimum engagement, value and growth possible. Some places do everything to limit these, often without even knowing it.
It is wise to design work and workplaces around these facts instead of assumptions about talent.