In 2003/4 Arsenal got through an entire league season without a defeat, winning the league at a canter. They have done less well since.
Fourth and struggling to finish in the Champions League spots for the last two seasons, despite a shiny new (and very impressive) stadium and a good run in the Champions League they have seemed too fragile too often to be considered anything close to league winners or the best side in the country.
They remain, on their day, beautiful to behold - a 4-0 win over Reading immediately springing to mind. But being "good on their day" is a very long way from being good enough to end a season with a zero in the loss column.
And it's hardly surprising.
Only five players remain from the Invincibles: the increasingly veteran Lehman; Gilberto; Ljunberg - who is being linked with Portsmouth; the impressive Toure; and bit-part player Clichy.
A lot of noise has been made of Arsenal's wonderful young players - but sometimes overlooked are the players they let go.
Goal scoring and penalty-winning match-winners such as Pires, Kanu, Reyes, and Wiltord have gone. Steel has gone too. Vieira is the obvious name, but Campbell, Parlour, Edu, and Keown all added ballast to the artists ahead of them. Ashley Cole might not be the most popular man in English football - but he was in 2004 one of the best left-backs in the world.
Of course there are two names I am yet to mention - Cygan and Aliadiare.
Henry or Bergkamp weren't useless either. They were two of the finest footballers to ever ply their trade in England - or anywhere for that matter. They - along with Vieira - were the heart of Arsenal, behind large parts of two title-winning teams, with only Henry missing from Arsene's other title winners.
This triumvirate - Vieira, Henry, Bergkamp - combine the very best of Wenger teams with something more. An end product.
Other players that drove success in early years moved on - Overmars, Petit, Adams (well, the whole back four), Seaman, Wright, Anelka. But each time others came in almost as capable or better.
But you don't get better than Henry, Bergkamp or Vieira.
And that is the fear. Arsenal still play some beautiful football. Still pass and move and counter punch with immeasurable elegance. But when the pressure is on, when the game is going away from you, who will win it in this new young team?
During the unbeaten season there were a few games where it was going badly wrong. 1-0 down to Portsmouth. Pires hits the deck, Henry scores the equaliser. 1-0 down against Liverpool away, Pires scores the winner.
Edu and Henry saw Arsenal come from behind to beat Chelsea, Henry equalised against Charlton; Pires equalised against Spurs in the 69th minute; a Bergkamp strike won the game against Blackburn in December; Pires scored away against Bolton and then the winner against Southampton. Vieira equalised against Chelsea away, Edu scored the winner. Henry and Pires shared the goals to come from 2-1 down to beat Liverpool 4-2. And on the final day of the season, 1-0 down at half time Cole falls, Henry scores the penalty, before Bergkamp unleashed Vieira for the winner.
The kids are good - but away to Bolton and Blackburn in December Begkamp and Pires won the games. Against Manchester City none of the current team found the back of the net, nor could they at West Ham (twice), Sheffield United, or Everton - all these games were lost.
When you look at the skill, fight, and goal scoring ability of the players that have gone it becomes clear why Arsenal are no longer even close to invincible.
Invincibles that have left:
Henry, Bergkamp, Cole, Pires, Vieira, Edu, Campbell, Parlour, Kanu, Reyes, Aliadiere, Keown, Wiltord, Cygan
Lehman, Gilberto; Ljunberg, Toure, Clichy.
Fàbregas, Senderos, Rosický, Gallas, van Persie, Hleb, Denílson, Flamini, Diaby, Djourou, Adebayor, Eboué, Hoyte, Walcott, Bendtner, Song.