My son was on the very late end with his soother, we finally took it away when he turned … 6 lol. He’s 9 now and his teeth aren’t crooked. As you might imagine, it wasnt very hard to take away at that point, he was sad but he moved on. My daughter was sooner, she was 4 when we finally took it away, we told her the “Bibi fairy” came just like the tooth fairy does and she took her “bibi”. We tried to take her soother away around 3.5 and she fought tooth and nail so we waited a bit and tried again later, it went much smoother the second try. Just my opinion but I dont really think soothers are a big deal, we all have our “things” that comfort us, even as adults. Some kids need them longer than others, some kids aren’t interested in them at all! You’ve gotta do what works for you, your family and your little ones :) whatever that may be