I'm comparing United to Arsenal, not Chelsea. I'm comparing Blackburn to Chelsea, Blackburn stopped United winning the title fairly early in United's dominance and they weren't as formidable as Chelsea. If Abramovich's Chelsea had come along 10 years earlier it might well have knocked United's dominance on the head, whereas it probably stopped us becoming the dominant force.

Plus United were arguably at their strongest when Wenger came to Arsenal, whereas there was no dominant force when Man U started to come good.