If there's anything left to say about the Panthers' enduring dominance then, surely, we are running out of ways to say it.

A 30-10 win over the Roosters on Friday night puts them within 80 minutes of a fifth straight grand final. It shuttered Panthers Stadium in fine style ahead of its rebuild over the next 12 months.

The ingredients were all there, especially in the first half, when Penrith were terrifying even by their standards, snatching the life right out of the Tricolours.

They have won so many games in recent years that the recipe is well known but the highlights are still worth citing.

Penrith have been winning for so long now it's easy to forget we're in the middle of the greatest winning run modern rugby league has ever seen and maybe will ever see.

From the opening set, the Panthers beat the Roosters up like they owed them money. Isaah Yeo surged through the middle with ease whenever he felt like it.

Nathan Cleary had half a dozen players in motion around him and he somehow found the time to show the ball to every single one of them.

The forwards brought the hammers, the backs brought the knives and the Tricolours were tenderised and carved up in every way a team can be. 

Coach Ivan Cleary said it might have been their best half of the year and that he could feel the lift in intensity this week after a few less-than-stellar performances running into the finals. 

In hindsight, 24-0 was not the worst half-time result for the Roosters – this was the kind of half where the trailing team must be grateful to still be alive by the end.

To their credit, they got back to their feet. They even won the second half. Two tries in the first five minutes was enough to inspire a little hope and if Joseph-Aukuso Sua'ali'I had not been denied a try due to a forward pass from Daniel Tupou, perhaps a fightback for the ages could have been the offing.

But after that chance, a victory never really felt possible and it's a measure of Penrith's dominance that the Roosters were left looking for silver linings.

That second-half let-off is perhaps the cruellest blow of all. Most of the time, Penrith do not run the score up – for all their attacking brilliance, they've only crossed 50 points twice since this run got started.

Perhaps the inhuman resolve, focus and physicality the Panthers play with must be rationed? Playing that way for 80 minutes straight might not be possible, so they save the rocket fuel for when it counts?

The by-product is an opponent might claim winning a second half or giving a good account of themselves late in a match.

They might take that memory into the next encounter, and stride in full of hope they can end an era that has defied years of NRL measures designed to stop this from happening.

In three seasons, all have failed, but nothing can last forever. Not even Penrith. There has to be a day when they stop winning.

But how can you believe that when the Yeo is running and Liam Martin is snarling and Jarome Luai is screaming and Cleary is asking questions only he knows the answer to?

How can you think Penrith could ever get sick of doing this? When there's no light at the end of the tunnel, just the roar of the black-clad crowd?

Penrith has a formula based around an addiction to the thrill of victory, a worship of the process required to get it, and Cleary's hydra of a kicking game.

As long as Penrith have that it could be them against the world and the world wouldn't have much of a chance.

Sure, nothing is invincible. Luai and Fisher-Harris are leaving this year but other key contributors have left before and been ably replaced.

The longer this goes on, the closer we surely get to the end. But it just keeps going. They just keep going. 

We might be running out of ways to say it, but Penrith keep winning.