100% of my experience with McKinsey has been trash. Just started working with new company and they wanted us to talk with these guys. We are reviewing some database systems and this guy is a literal joker. His suggestion to speeding up our database "well we can use REDIS, REDIS is fast because it's in-memory". So we want to put how many TB of data into REDIS? We are talking about tons of historic data that never changes. And we are going to load it ALL into REDIS because it's fast. These McKinsey folks spend months talking about the data lake and it turns out data lake just means a bunch of shit on s3.
It's like if you paid someone $50,000 to help you find a good car. Client wants a fast car. Oh you want a fast car? Buy a ferrari they have big engines and can generate tons of horsepower. Job done, can i collect my 50k now?
Mind you this guys linkedIn and resume read like a CEO wet dream. AI and machine learning data science all over...
We spent months dilly dallying with different tech before they just left cold turkey , havent heard from em since. And our 20% complete projects experimenting with all kinds of DB tech have done nothing.