For who?
For home/hobby/webmaster ? Hell no!
But for IT manager/corporate blue worker who use web browser as means of running intranet web-app? Hell yes!
MS with IE serve some important market here.
Also that is BIGGEST differentiation point for IE in corporate marketplace. Any competent IT admin, can plug Chrome/FF into update/maintainance tools (by himself or by using services offered by 3rd party). But LONG stability/maintainability of web browser? Chrome and FF are not even likely to pretend to compete here. MS have upper hand here. Discarding would be stupid…
… since they can not show off any other real advantage :P