Say that again
What, apart perhaps from XmlHttpRequest, did IE 6 give us? As a browser it was shit from the word go, though hardly anyone noticed as Mozilla went down the dark and blind alley of XUL.
Back then it was generally considered among the developers I worked with to be bad practice to do IE 6 only work. The legacy crap (SAP, Siebel, etc.) that we're still dealing with should never have been written as websites. It was done because of the hype but was broken by design because it was IE and MS Windows specific. No point in wasting browser runtime in that context.
ActiveX and thus IE was a requirement in countries like Korea which were not allowed 128-bit encryption until the export restrictions were relaxed. This explains the relatively high percentage of IE in some countries: retooling is essential but expensive.
Where IE, warts and all, did play a big part was when developers wanted to include browser functionality in their Windows deskop program. Perfectly legitimate decision assuming you can swap the component out for cross-platform development or just to keep in step with the MFC or later .NET CLR releases. Adobe did this with the help system.