Why Microsoft did the right thing in ditching XP for IE9

I recently expressed a lack of surprise that Internet Explorer 9 will almost certainly not be supported on Windows XP. In Redmond's words, a "modern browser" needs a "modern operating system," and Windows XP doesn't qualify. Much to my surprise (well, not really, I know that XP is still used and, apparently, loved by many), many doubted my characterization of XP as "obsolete," and they questioned my lack of surprise at this decision.

Simple things first. Windows XP is not a new operating system. Windows XP was released in 2001, and it has been succeeded by not one, but two newer operating systems: Windows Vista, and Windows 7. The other major desktop platform vendor—Apple—doesn't even begin to support anything that old, and the company routinely restricts its software compatibility to only the most recent version or two of its operating system.