Michael Steil's exploration of illegal opcodes in the MOS 6502 processor dives into the fascinating nuances of outdated technology. His insights shed light on how these illegal commands can act unexpectedly and lead to interesting behavior in software applications. The discussion of these opcodes not only appeals to retro computing enthusiasts but also enriches one's understanding of computer architecture and programming. Notably, commenters express their appreciation for his 'Ultimate Guides' covering various platforms, indicating a strong community interest in legacy systems and their quirks. This reflects a broader trend of nostalgia and appreciation for vintage technology in today's tech landscape.