There are a lot of ways to damage the system for want of a better word.
One has alreafy been mentioned and thats movement of the seat over time
to include rough handling when taking the seat out of the car for instance.
One big no no that I was informed about years back was the practice of kneeling on the seat
to reach over the back or other side.
Apart from making the leather sag it can damage the heting pad or element whatever its called.
I am not an authority, just repeating what I was told by someone in the know!