Excerpt from an "exit" interview
As Bill Gates prepares to end his full-time work at Microsoft, he tells the BBC in an interview that it wasn't just what Microsoft did, but what his rivals didn't do that let Microsoft get ahead.
"Most of our competitors were one-product wonders," he says.
"They would do their one product, but never get their engineering sorted out.
"They did not think about software in this broad way. They did not think about tools or efficiency. They would therefore do one product, but would not renew it to get it to the next generation."