The neuroplasticity limit
As we all know, there is a neuroplasticity limit somewhere between 20 and 22, If anyone has experience, could they tell me when they hit the limit? I'm afraid my time is coming to a end, and while im not smart at all, the neuroplasticity limit will make it effectively impossible for me to do things I want, ICPC,cm codeforces, usaco plat, etc...
Please be 18+ and atleast blue if you are going to respond, I want to hear serious experiences from people in the same position, if not better than me rather than 100 newbies who are stuck because they only sovle 800s.