Smitty takes a look at that question when he considers how the government grew to reach critical morass.
Which operating system has more systems deployed: Microsoft’s Win*, or the various Unix flavors (with Apple’s line standing far closer to Unix)? Linux, in particular, is wrecking all non-desktop comers (supercomputers, routers, servers) because Linus Torvalds is ruthlessly anti-bloat. The U.S. Code is far more like Windows, with its tendency to add more layers of noise atop the existing crap, without insufficient trimming of legacy crap.
Ruthless focus on first principals is the difference between Apple under Steve Jobs and Microsoft under Steve Balmer. It’s the difference between George Patton and William Westmoreland. It’s the difference between spectacular success and meh.
And, yes, all the computers in my business and my household run either some form of Mac OS or Linux, and all my families mobile devices run iOS.