This is what you'd believe if all you'd known about the Microsoft antitrust case was what Wikipedia records about it it in the short "Settlement" section of the Microsoft Antitrust Case article.

In reality, the case broke Microsoft's monopoly on pretty much everything but desktop operating systems (the market broke that later on) and a chastened Microsoft was unable to apply its 1990s tactics to the emerging mobile market, in which it was soundly trounced.

The antitrust objectives of the government were essentially accomplished. Microsoft remains a fearsome competitor in the moribund personal computer market, and essentially nowhere else. Its browser, the focus of the case, is an an also-ran fork of Chromium. It has more or less entirely lost the server market, outside of line-of-business applications in the Fortune 500 that it would have retained regardless of its monopoly status. It's been sidelined almost entirely from mobile computing. Microsoft doesn't even control office software anymore!

Linux nerds dearly wanted to see Microsoft split up, because that's a theatrical and cathartic ending to a case many of them had (weirdly) personalized. But it's clear now that splitting up Microsoft wouldn't have served any public policy objective, and Jackson was wrong to order it split up.