https://arstechnica.com/gadgets/2018/05/what-microsoft-could-learn-from-apple/

A couple of Gartner analysts have recently claimed that Windows is "collapsing"—that it's too big, too sprawling, and too old to allow rapid development and significant new features. Although organizations like Gartner depend on trolling to drum up business, I think this time they could be onto something. "Collapsing" is over-dramatic—gradual decline is a more likely outcome—but the essence of what they're saying—and why they're saying it—rings true.

Windows is dying, Windows applications suck, and Microsoft is too blinkered to fix any of it—that's the argument. The truth is that Windows is hampered by 25-year old design decisions. These decisions mean that it's clunky to use and absolutely horrible to write applications for. The applications that people do write are almost universally terrible. They're ugly, they're inconsistent, they're disorganized; there's no finesse, no care lavished on them. Microsoft—surely the company with the greatest interest in making Windows and Windows applications exude quality—is, in fact, one of the worst perpetrators.