The more abstraction you shove down the programmer's throat, the less he will understand what's really going on behind the scenes. Eventually the abstractions become more of an impediment than a panacea, e.g. when you try to do simple things. And we also end up with the creation of "leaky abstractions", since programmers who create them have developed a love for abstraction (what might contribute to that?) but little understanding of the lower levels.

There was a recent post on HN regarding /usr/local that seemed to suggest some programmers do not understand what a partition is nor should they need to become acquainted with such unimportant details. I hope I'm wrong in that interpretation. Because if true, that is just sad.