Quoting C-Herman:" Maybe I'm different from others, but I was still doing this with my baby at 6 months and then we saw ... [snip!] ... goes to sleep on her own. It took maybe a week and a half for her to get the hang of the routine, but it was worth it for us!"
Not all babies adjust so easily
Some also believe the child's need for the contents of breastmilk should be encouraged and honored whilst the child shows this need is so great. Personally i would've liked more sleep but i know DS greatly benefited from all the brain boosters and antibodies and sensory regulation involved with night nursing. Pedi's are generally only trained in the basic nutrition aspects and i think the choice has to come from weighing up research alongside your individual situation.