I stopped school after my undergrad. I have forgotten nearly all of it. Hell, I've forgotten most everything I've ever learned. I don't recall a lot of the earl

I stopped school after my undergrad. I have forgotten nearly all of it. Hell, I've forgotten most everything I've ever learned. I don't recall a lot of the early seasons of any of the shows I enjoy. I'm slower to learn new things, slower to implement things, slower working out, and the list goes on. People still consider me smart and highly productive and enjoy working with me. Turns out that while I don't recall specifics often enough, I have developed ways of working that scaffold what I know. "Standard operating procedure." I can still think through systems, debug hard problems, sling code, work great with teams, delegate, ask for help, mentor, mentee, learn new things (albeit slower than before, and it has to provide value, usually quickly), teach, etc. I'm slower. I'm more experienced. I'm doing great. You say you feel slow and not as sharp. I'd equate this to typing speed. If you were typing 90wpm and got slow and errored more, would that stop a career in tech? I work with a guy who hunt and pecks when typing with two fingers. He is a fantastic developer and doing great. If you enjoy it and people enjoy working with you and you are productive, then you will be fine.