I mean it's not that difficult to do, what gives?
And no... the camera LED does not count.
see OP? a bunch of people came here to ream you out about it and a couple of supporters got chewed out also.
camera flash LED notifications are pointless because most of the time your phone will be facing up.
LED notifications would not hurt the "apple" design. not anymore than keeping the top and bottom of the phone obnoxiously thick (yes, i know there is probably some engineering purpose, but it still looks the same as it did the PAST 4 YEARS!).
90's, early 2000's, blackberry, etc are examples people throw out to make a point, but again, almost all phones that are not apple have some sort of notification light so that you do not have to turn on your screen to check. whether its a gimmick or not, its useful.
in the end, it doesn't matter as the iphone is packed with plenty of other features and "gimmicks", but LED notifications are useful.