It had its day, like when there was nothing else. As soon as a competitor jumped on the scene IE was doomed.
Huh? Netscape was killing it, IE was MS' answer when Microsoft damn near missed the Internet revolution. MS' answer to try and control its lapsed decision was to embed IE into the OS and they got (rightfully) smacked down. IE was garbage from day one, MS lost and just needs to let it die and be done with it. Plenty of other ways they can re-invent the connectivity experience given all the device now connected to the Internet.