There is virtually no chance that Internet Explorer 9 will be as successful as IE8. IE9 is only compatible with Windows Vista (SP2 or greater), and Windows 7. IE8 alone commands 35 percent of the browser market, followed by Internet Explorer 6 in third place. IE 9 is starting out with a distinct disadvantage because by default it can only work with about a third of the PCs out there. Maybe by we get to Internet Explorer 10 the world will have transitioned off of Windows XP and it will be a more even fight.”]
Source: https://www.csoonline.com/article/2127721/why-internet-explorer-9-will-never-be-number-one.html