I am a success story. Tinnitus went away.
Tinnitus is entirely curable depending on the cause
Yes, we already knew this. The bold part is especially important. Most of us here are suffering because of noise-induced or ototoxic reasons. Although I know tinnitus related to noise-induced trauma can surely go away on it's own (I'm a living example of that happening to me before), it is certainly not "entirely curable" or we wouldn't be here. You can do some things to improve the condition or your outlook on it though, and hopefully (with "God's grace" and hot sliced bread on your ears) it will make up its mind and leave altogether.