Keeping things secret is only a part of the problem. Corporate utter forgetfulness of the past is another. Consider the tale related by Stephen Walli (referenced at https://news.ycombinator.com/item?id=11560510) about the Microsoft people who didn't even know that Microsoft had the SFUA/SUA with Windows NT.
> "I had to explain to the [Windows High Performance Computing team] that they already owned the technology they needed, but to no avail. They couldn't get their head around the idea."
> "I had to explain to the [Windows High Performance Computing team] that they already owned the technology they needed, but to no avail. They couldn't get their head around the idea."