I have given the topic some thoughts. I concluded that the ONLY way for ordinary people (non-genius, IQ <= 120) to be really good, be really close to the genius, is to sit down, condensate the past 40 or so year's tech history of three topics (Comp-Arch, OS and Compiler) into a 4-5 years of self-education.

Such education is COMPLETELY different from the one they offered in school, but closer to those offered in premium schools (MIT/Berkeley). Basically, I'd call it "Software engineering archaeology". Students are supposed to take on ancient software, compile them, and figure out how to add new features.

For example, for the OS kernel branch:

- Course 0: MIT xv6 lab, then figure out which subsystem you are interested in (fs? scheduler? drivers?)

- Course 0.5: System programming for modern Linux and NT, mostly to get familiar with user space development and syscalls

- Course 1: Build Linux 0.95, run all of your toolchains in a docker container. Move it to 64-bit. Say you are interested in fs -- figure out the VFS code and write a couple of fs for it. Linux 0.95 only has Minix fs so there are a lot of simpler options to choose from.

- Course 2: Maybe build a modern Linux, like 5.9, and then do the same thing. This time the student is supposed to implement a much more sophiscated fs, maybe something from the SunOS or WinNT that was not there.

- Course 3 & 4: Do the same thing with leaked NT 3.5 and NT 4.0 kernel. It's just for personal use so I wouldn't worry about the lawyers.

For reading, there are a lot of books about Linux kernels and NT kernels.