In South Korea, ActiveX is still required for many things like banking and government stuff. So they're stuck with both IE and the gaping security hole in it that is ActiveX.
Not really. You can access any Korean bank or government website using Chrome, and they actually recommend Chrome these days.
They still want to install a bunch of programs on your computer, though. It's more or less the same stuff that used to be written as ActiveX extensions, but rewritten using modern browser APIs. :(