I think its all about blind loyalty!
I dont particularly like Manchester for shopping, nights out or anything really, but i feel that there are a few factors within many that feel that the club should stay in an OL postcode!
1) Selfishness, personally i dont want to move from what i has become a sanctuary for many, especially getting out of the missus way!
2) Accessibility, as above we get used to things and it would take some time to adapt to life in Failsworth. I lived 2 minutes from the ground and now i live in Shaw, i feel that a pain in the arse! (or just lazyitis!)
3) Identity, we are Oldham, a lot of fans feel as though things could change with regards the club name or Oldham the town be ignored in favour of the new surrounding areas.
4) Commerce, lets face it Citeh and Manure fans are everywhere, that will never change, but the fact that we would be moving to a Citeh hotbed makes it so much harder to create a new fanbase with more commercial sales.
Im sure i will think of more when my kids go to sleep, but for now that'll do.