I understand pretty much all of the layers of the computing from how CPUs achieve some of the things they are doing to bus protocols, to instructions, physical

I understand pretty much all of the layers of the computing from how CPUs achieve some of the things they are doing to bus protocols, to instructions, physical memory, low level OS internals, high level OS internals, virtual memory, userspace platform communication with OS, programming language runtimes and linking, shared libraries, IPC, networking, virtualization, etc. If by "understand" you mean "have a passing familiarity with" then.. sure, but if you mean "my understanding is reflective of reality" then there's absolutely no way. We, people who really understand the technology that the world runs on, are a slowly dying breed. There are more people doing "low level" programming right now than were doing it a few decades ago. The only knowledge that is fading is knowledge that's applicable to legacy and/or retro systems.