Classic/BC realms..why not?

I know this has been brought up like 1000000000000 million times before but, it would be an awesome idea, the fact that alot of people joined during wrath/cata or like me late into BC and never got to enjoy the Classic/BC raids in there fullest, instead i did them while getting achievements/helping a guildie get a legendarie etc. but the point is it would be a damn good idea to do these realms, and call me dumb and all but isn't in a companys best intrest to give people what they want (not all the time obviously because that would be spoiling) but if you did that there would probably be tons of people coming back to WoW/ people being generally happy ad having fun being able to do previous raids that were fun.