I either fed DD to sleep or walked her to sleep in a sling until she was about 12 months old. Only just before the 1 year mark did she start waking up frequently during the night but that was due to teething and her walking etc. Before that she used to sleep for anything from 3-5 hour stretches, at night getting a quick booby feed to resettle then off to sleep again. As Isaid, it went out of the window at 12 months. At around the same time I did notice however that she had stopped feeding to sleep, instead would have her feed, then cuddle up to me and go to sleep like that. I started taking her into her cot awake and all of a sudden this didn't cause a screaming fit. Instead I just had to pat her bum for a minute and she'd rift off by herself. Before that she NEVER settled in her cot, patting, singing and rocking didn't calm her, only taking her out did.
Other people never had a problem settling her wihtout a feed. But if she was with me, she knew the boobs were just right under her nose, so she wanted them.
Don't worry too much. If it isn't a problem for you, then go with it. You can still address it later if it does turn out to become an issue.

All the best, Saša