When Blekko was acquired by IBM in 2015 we had an "Integration Executive" assigned to us who was responsible for all the 'detail work' of the integration (if you can imagine a project manager for an integration that would describe their job). He had joined IBM in the '80s. I found his perspective on the Gerstner years pretty fascinating.

I had interned at IBM in the late 70's (as a high school kid of all things) and decided it was more of a real estate company than a computer company :-). Up until Gerstner, IBM had a policy of acquiring and holding real estate as a hedge. Often reported on the books under "cash equivalents" because real estate had the property that it could usually be liquidated when required into cash. When we were acquired in 2015 that had changed, nearly all of the places I had worked in the 70's were no longer owned (or operated) by IBM.

Our exec said that those property holdings were the only thing that kept IBM alive between 1990 and 2000. They had to ruthlessly re-tool the entire business and that required a lot of up front cash without a product revenue stream to fund it. That was Gerstner's legacy for him, he used that asset to re-invent the company around consulting services, business automation, enterprise data processing, and business insights driven by processing billions of metrics.

And it turned out that a lot of companies needed to understand their business better, and automate it, to adapt to this new fangled thing called the Internet.

We both agreed that they would be unlikely to do that again as they had used up their 'secret weapon' already.