I already knew that, but for me, it was more a warning about how difficult it is to get complex software systems right, and how grotesquely they can fail, with

I already knew that, but for me, it was more a warning about how difficult it is to get complex software systems right, and how grotesquely they can fail, with implications for life-critical systems that depend on them, and more and more things being controlled by software with such couplings.