I can't speak for anyone else, but I have gotten over my extreme shyness. It lasted well into my late twenties, then lessened greatly during my thirties. It might have been a combination of my determination (mindset) and job, where I interacted with people. Now after a lifetime of being shy I'm not sure how to make friends with other adults. I was focused so hard on ridding my shyness, I guess I didn't realize I still have a lack of social skills yet. Or in other words, curing my shyness didn't automatically give me great social skills. Something I have to work on yet. I can talk to people now without the anxiety, but I'm often brief and to the point.