Yes, good hiring managers with sharp vision will always want to hire new grades who is able to write operating systems, compilers or simulators from scratch. Having those essential CS skills are much better than having many buzz words in the resume.
I purchased one in 1984 to learn CP/M and Z-80 assembly on the Apple II. Later I used it to learn Fortran and Turbo Pascal, and finally bought a PCPI Applicard to speed the things up. The Z-80 softcard could be one of the best cards in Apple II's history, IMHO.
Unfortunately, there is no shortcut to challenge FANG types of companies -- you have to practice at least 200 leetcode problems, and able to solve two medium level problems in 45 mins. So practice more and efficiently is the key to success.
Wow...Nevada Cobol. That brings back some memories. We were kinda shocked someone could fit it on a CP/M machine. Had a friend who learned enough using Nevada at home to get a job doing VM/370 Cobol for an airline and ended up becoming a VP by the time he retired.