Maybe because of "lifespans"? People live for ~80 years... doing a 2-4 decade study isn't out of the realm of possibility. Computers on the other hand... Whil

Maybe because of "lifespans"? People live for ~80 years... doing a 2-4 decade study isn't out of the realm of possibility. Computers on the other hand... While there are a few mainframes that live to be 10 years old - the vast majority of the internet, program languages, apps, etc... Hell, even the iPhone just hit 10 years old. How can you have a 20 year study when the majority of "code" is less than 10 years old?