Maybe another way of putting it would be "the thrill is gone".

Most us started out with a lot of enthusiasm for programming, but for some it slowly eroded along the way or the novelty wore off. To me, it's a mystery why some people can maintain their passion in the long run, for some it's on and off while for others it completely dies at some point.

I also find it funny that Australians felt the need to turn the "can't be bothered" expression into something slightly stronger, if the author is right about this.