Microsoft also had a first-to-market advantage with early versions of Windows, and they also gained from almost no productivity app competiton back in the 1990s

Microsoft also had a first-to-market advantage with early versions of Windows, and they also gained from almost no productivity app competiton back in the 1990s. So what you're saying is further multiplied by all the businesses who chose Win 95 over Mac OS 8, then stuck with Windows when upgrading their equipment.