Like Seymour Crays source code which used bit manipulation instructions in places like masking instead of straightforward mathematical operations because it was faster in cray cos, I remember disassembling elite, and learning from the not-so-straightforward parts of the dump the small tricks and techniques to get more from less.
I thought i was king of the hill in the 80s when i went out with my few years of coding to work, only to run up against old mainframe guys who could glance at a page of core dump and spot the programming error!!! That was me put in my place. Took me years to learn that, and only after i went back and covered electrical engineering.
I really miss those days, when it was all about how to get a gallon from a pint pot, unlike now where we seem determined to get a pint pot from a gallon.