John Carmack reflects on Musashi's Book of Five Rings, noting how martial arts evolved from battlefield tools to sports and hobbies. Post-WW2, Judo was likened to western wrestling and Kendo to fencing. He draws parallels to programming, where hand-assembling opcodes and assembly coding are becoming obsolete.

AI is rendering many coding skills less critical. While retro computing thrives, Carmack warns against clinging to outdated practices. He urges embracing change rather than becoming an 'out of touch Kung Fu master' defeated by modern approaches.

Musashi, he adds, would likely embrace assault rifles if alive today.