But before then, no sides could compete with man United and Arsenal because of their superior financial position. What Abramovich's money did was to allow supporters of other clubs to believe that they could compete with those two sides. Now there are six clubs always in contention rather than two and, as Leicester have shown, other sides can break in asa well.
Nothing currently being written about the "invincibles" mentions how resoundingly they were beaten in the Champion's League that year.
If anything, Arsenal's plateauing since then has been caused more by the Board's decision to attempt to break even despite the stadium move. They have two of the weatlthiest owners in the league. Hardly the stuff of poverty.