I think having teams of people with a mixture of longevity gives a company the best of both worlds: a breadth of industry experience and deep company experience. A key aspect to gain the most benefit is to give neither type of experience control i.e. don't blindly follow the embedded experts but also don't assume that the person bringing experience from the outside will know best. It is the combination that can provide the most potential.

In the context of the editorial, I suggest that there is not one best strategy or rather if there is then it is a combination of the two.