Historically, there has been a bigger trade-off between safety and performance, and performance has been much more important. Besides, there are many many fact

Historically, there has been a bigger trade-off between safety and performance, and performance has been much more important. Besides, there are many many factors determining successes of OSes, often far removed from quality of the software itself (1986 AmigaOS had GUI and multitasking, and still lost to MS-DOS and Windows 3.1).