I have spent a lot of time on these forums over the years, especially searching for advice about a baby who nursed "all night long". I thought I would share our story. My son has always been a big fan of nursing, and at 3 years old, he is still. I have never held back, never said no (although occasionally as he was over two discouraged him here and there when he didn't really need to). And for the first 18 months of his life he nursed about every 45 minutes all night long. We coslept, and I just let him do it as he pleased. And at the same time, I wondered if it would ever stop, if he would ever learn to sleep through the night, and more than anything if there was going to be a major battle to get him to night wean someday. But I didn't want the heartache and trouble of night weaning my friends were having, so I just kept at it. By about 2 he was nursing every 2 hours at night, and by 2.5 once or twice. Now, he is almost 3, and he sleeps through the night. He nurses for about 3 minutes to fall asleep, and then when he wakes in the morning he can lay there and nurse for upwards of 45 minutes -- we both enjoy it, I read a novel laying in bed (yay!) and he gets the intimacy he loves. Then that's it until bedtime.
So, the answer is, at least in our family, that it will happen someday and it can be peaceful and child-led. I am really delighted that it worked out this way and treasure our breastfeeding relationship. Now for the tandem adventure as we are expecting #2 in about 4 months!