It's never gone but , if you know the trigger words through which / by which you stammer you can remove 95 percent of stuttering. Plus what helps is also having achievements in the sense that on the days I know that I've done whatever I've had to do i stammer much less but on days that I've been indulging in stuff which is not good for me i stammer . Plus find out if you have social anxiety and that's why you stammer of do you stutter and that's why you have social anxiety. I was out in positions where not speaking and interacting wasn't a choice . It was either be a failure and be mediocre or speak and I chose speaking while keeping my head up high . If you want to know of prominent figures which experience stuttering search Dipender Goel (CEO of Zomato ) interview. He also stammers but it wasn't a choice for him to not speak so he spoke .