I can say I’m 100% cured… I had it very bad in my early 20s. Every social interaction was absolute torture. I finally got past it when I was about 26. As I learned, part of what cured me was when I stopped looking at my speech block like a disease. Everybody stutters, most of them just don’t care enough to beat themselves up about it. They instantly move on and treat it like nothing, and when you get to a point where you truly don’t give those negative thoughts any power in your mind, it melts away pretty fast (and even if you do stutter again, it still doesn’t get to you if you don’t care)! You’re effectively reversing the self-defeating death spiral that makes stuttering so horrible in the first place.