I assume you know that I wasn't thinking of IE 5.5. Why not just say that you personally don't have to support anything below IE10 and so you didn't bother thinking about them?
Some web developers out there are still supporting ActiveX components that no one is willing to replace. I don't think anyone would advocate building a new site using ActiveX though. At some point we have to move forward and adopt new technologies that improve the way things are built. We're at a point in web dev where Grid is ready for mainstream use.