If it is so much work for Microsoft to support IE9 on XP, they should make it and offer it for sale. Since XP is so important, and IE9 is so important, people w

If it is so much work for Microsoft to support IE9 on XP, they should make it and offer it for sale. Since XP is so important, and IE9 is so important, people will surely pay for a browser upgrade, right? What's the market price for a modern browser? $79? $29? $0?! How on earth did that happen?