Stutter can be 100% cured, many cases resolve in childhood, some even in adulthood, and it's real cure, not just management. In my case, I had a decade of speaking absolutely fluently in the most stressful situations, I didn't stutter at all, it wasn't hiding it or overcoming it every time I spoke, I just didn't stutter. It did have a gnarly return, but only after a very serious stress and a major change in life, and I believe it will go away again and becoming absolutely fluent is very much darn possible