An operating system monopoly is not necessarily the problem, it's when an operating system monopoly is used to gain a monopoly on applications. In the same way

An operating system monopoly is not necessarily the problem, it's when an operating system monopoly is used to gain a monopoly on applications. In the same way users don't care about diversity, they don't care about operating systems. They care about applications. If Microsoft Office ran on other operating systems AND OPERATED EXACTLY THE SAME WAY (which excludes Microsoft's attempts to have Office and IE on the Mac), then the user could still get help from friends when stuff breaks and share documents. It may have been someone else, but perhaps that someone else would have been about encourages standards and interoperability and not application lock-in.