My opinion is: software is building on higher- and higher-level components, and people don't know what's happening inside, hence they are not aware of the borde

My opinion is: software is building on higher- and higher-level components, and people don't know what's happening inside, hence they are not aware of the border cases. Testing is getting much more difficult. Also https://xkcd.com/2347/ https://xkcd.com/2347/