But if you want a serious discussion about why there are no super league clubs in Manchester then its important to define Manchester. On paper United play in Trafford. People don't live on paper though. People live in the real world. A world i'm trying to stress to people not from the area, if you don't want to take that info on-board then there is nothing else to say.
No, if you want a serious discussion about an area, you all have to be in agreement about what the area actually is. You can say what you like about what YOU personally consider to be Manchester, and you can say what you like about what YOU personally think others in the area think, but that doesn't make it true. There will be (and definitely are) others that don't agree with you from the area about what is and isn't "Manchester".
The only way you can discuss it is if you use the proper boundaries. We're talking Manchester (the City of). A place that only has 2 RL teams at a very low level. That is the real world. The rest is just your opinion of the world.
If you want to go off a colourful map instead, you are basically saying there is one semi large unsuccessful football team in Manchester and nothing else other than the cycling team. So Manchester is ripe for expansion and Salford have zero competition for fans. It would be totally wrong. You know it, I know it. To argue anything else is pointless and makes the thread pointless.
I wouldn't call a top-4 Premier League football team attracting 40k+ a game "unsuccessful". I'd say that's a pretty big competitor!
And saying Salford has no competition is a ridiculous argument. How could anyone who is discussing the boundaries of Manchester using the ACTUAL boundaries governed by the land argue that? Even if there were NO clubs in Manchester, how would that make Salford (a team OUTSIDE Manchester) have no competition? If you're talking about a club OUTSIDE Manchester, you have to look at other clubs OUTSIDE Manchester as well as competition, and that would include your (technically) Man Utds, Sales, Oldhams, Burys, Rochdales, Stockports, etc.
I highly doubt there will be expansion into Manchester. Football is to entrenched in the city. The BBC sport department is moving to Salford not Manchester and Granada may be following anyway, hence the Reds.
I think expansion into Manchester is very possible, but not on a major level. Not on a SL level. But playing numbers and and increase in amateur teams is certainly possible and something that should be happening (alongside the other boroughs). Spectator-wise, Salford should be targeting fans from Manchester in more significant numbers than they are getting (they have a huge catchment area but only average 4-5k fans), which compared to Sale (who for all intents and purposes are still a poorly supported RU club in a non-RU area) is still poor.
Football will always be king, but RL should definitely be the prince in a big northern city. At the moment, it is a bit of a jester.
I guess it went that way historically simply because it did. Its a very unsatisfactory way to answer the question but why football in Liverpool, Manchester, Blackburn, Bolton etc. and rugby in Wigan, Warrington, St Helens etc? I can't imagine workers in the late 1800's giving a stuff what code of football they watched. The teams of the time were factory teams, so it could depend on what university the factory owner went to. Or maybe one town started a team and the other local teams wanted to compete, hence the teams are very localised around the north of the country. They are complete guesses though.
Simply because it did isn't really an answer in the slightest. There are reasons, even if we don't know them. Even if the answer is "we didn't get in there quick enough, and by the time we tried it was too late to make a decent effort because of the juggernaught that is football".