Me also, still rolling code for custom embedded hardware at 65. Started in the mid 1980s, in embedded, running proprietary RTOS, then later, commercial RTOS (pSOS, vxWorks, ThreadX, QNX), then NetBSD, and now Linux.
The amount of Python code I have written in the last three years, when I really only learned Python six years ago....
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.
The amount of Python code I have written in the last three years, when I really only learned Python six years ago....