My current mentor is 67 and pretty much knows everything. His coding style is shit, and he's slow as molasses, but he has an insane memory that can recall obsol

My current mentor is 67 and pretty much knows everything. His coding style is shit, and he's slow as molasses, but he has an insane memory that can recall obsolete architecture ISAs, compiler quirks (for dozens of compilers), and tribal knowledge for just about every kind of trick and technique. That's probably why he is so slow: if I had to navigate 5 decades of lossless knowledge I probably wouldn't be able to walk.