Given my limited memory abilities, I have doubts that I'll ever have a master level or even very strong grasp of more than 2-3 languages at any point in time. C

Given my limited memory abilities, I have doubts that I'll ever have a master level or even very strong grasp of more than 2-3 languages at any point in time. C, C++, python, Clojure, and Java are usually in that circular queue (both when I was in school and now in industry), but I find myself humbled every time I come back to one after 6+ months. I imagine that if I were to truly sink 10 years into a single environment, especially a nearly stagnant one like C, I'd carve out some deep pathways in my brain.