I entirely agree with you - but I think the hardest thing is SPLITTING THINGS UP into coherent units that compose the lower level API you write about. The prob

I entirely agree with you - but I think the hardest thing is SPLITTING THINGS UP into coherent units that compose the lower level API you write about. The problem is that we can divide things in many possible ways - what makes one division better then the other? This is hard, layering is the easier part (but still far from obvious: http://perlalchemy.blogspot.com/2012/04/breaking-problems-down-and-defaults.html http://perlalchemy.blogspot.com/2012/04/breaking-problems-do...).