High continuous success may diminish intensity and pose a danger to future victories.
When you've won two, three, or - In Penrith's case - four premierships in a row, is there a danger you'll become the biggest threat to your chances of winning it again?
I would never ridiculously suggest winning premierships could ever get boring, but after you've strung a few together can the process get a bit mechanical, at least, and eat into your intensity that way?
After experiencing a high degree of success the trick is to be able to handle the process well enough to get you to that moment where you can win it all again.