Reading the article by a former Microsoft executive in today's NYTimes, one thought comes to my mind: the Microsoft antitrust case was a failure. It did nothing to foster competition, and it made Microsoft wary of developing. The best you can say is that it was stopped before doing even more damage. Add it to the complete failure of the AT&T breakup, and you start believing that antitrust legislation has no positive role to play in the technology industry.
I was very critical of Microsoft's monopolistic practices at the time and thought that the lawsuit made sense. I was wrong. I was not happy with Microsoft products and preferred to use NeXT. That part was correct. As Tartakower said, "Some part of a mistake is always correct."