Microsoft continued to gain market share with Windows, focusing on delivering software to cheap commodity personal computers while Apple was delivering a richly engineered, but expensive, experience. Apple relied on high profit margins and never developed a clear response. Instead they sued Microsoft for using a graphical user interface similar to the Apple Lisa in Apple Computer, Inc. v. Microsoft Corporation. The lawsuit dragged on for years before it was finally dismissed. At the same time, a series of major product flops and missed deadlines sullied Apple's reputation, and Sculley was replaced by Michael Spindler.
Well, no, it doesn't. What made Apple fall was in the end, as the article puts it, "a series of major product flops and missed deadlines". That's not what's happening right now. The "Antennagate" (which one might argue wasn't a "-gate" at all) is the only "flop" from Apple (product-wise) in the past few years. iPhones, iPads and Macs are selling like hot cakes, and as much as many nerds disagree with Apple's legal actions, no word can be said about them being "flops". They're all incredible machines (Mac is incredible for developers and naïve users alike, but iOS is probably more suited to the users rather than most developers - however only a fraction of a percent of population are developers).