I think you and the person you responded to are talking past each other a little bit. Complexity analysis may well be a poor fit, but still not as poor as a ham

I think you and the person you responded to are talking past each other a little bit. Complexity analysis may well be a poor fit, but still not as poor as a hammer's screw-turning ability. Complexity's poor fit to the real world is a criticism of its use as a programmer's tool, not the concept itself.