half-life doesn't mean your code just suddenly expires one day. some code will be around for a long time. the fact you've made updates alone validates the law... why didn't leave your code alone? ever wrote something that didn't make it to production?

geo-what?

Hey there, right, sure some code lasts longer than others right? of course... but not forever.

Hardware alone is changing all the time, making more and more software obsolete everyday. I believe that's at least one element driving the law.