[taeric]

This seems to me to be as much "you have a hard time replacing what you know works in some (indeed many) cases with something that might be harder to apply in simple cases but is always correct" as it is "you have a hard time learning correct things."

That is, the ideas (that this piece mentioned) that people had a hard time leaving behind seemed to be those that work as decent guidelines, even if they are not accurate. Speed of processing is a value in our minds as much as it is in a computer. If you have a rule of thumb that works rather well, why abandon it?