Can you break a habit?

There is a school of thought which says that you cannot break a habit:

Well, you may think you are, but the truth of that matter is that you cannot break or change a habit. You can, however, create new, better and even stronger habits. And while you may think that the old habits are forever gone, they are simply hiding out. At some point in time, one or more will get triggered.

What do you think?