alt Hacker NewsImagine having a shell script being called from a cron job that writes data in a bunch of tab separated memory mapped files (memory mapping happens when you configure the thing), but you have more files than memory. And all the shell scripts call and include each other and have global variables too.
And that underpins most of the critical infrastructure in your country.
Except mainframe IO and interrupts actually work reliably. Unix on the other hand is a proud member of the worse is better club. It still doesn’t really handle interrupts correctly, but thanks to 40 years of kludges most people consider it close enough.