I don't have an opinion on how useful McKinsey is, but I'll note that no one is pointing out that they also did a lot of work for Microsoft before their big turnaround.
Enron and Valeant are two of the most significant examples of corporate malfeasance over the past 20 years; McKinsey or its partners were directly involved in both.
I don't have an opinion on how useful McKinsey is, but I'll note that no one is pointing out that they also did a lot of work for Microsoft before their big turnaround.