Thanks very much for your feedback, Sorator, it was most helpful. It's true that, given the resources Jagex is currently expending on bot nuking, legal action and so on, I'm not sure they'd be able to maintain it (I worked on the presumption that Jagex would backdate code, out of sheer optimism). Out of interest, in what way do you expect people would get angry if the proposal were to become a reality? I'm sure there's a valid logic to it (RS players being the volatile creatures that they are), but I can't see one.
I agree with Crocefisso that it's in large part my positive nostalgia, as he so aptly put it, which keeps me playing to this day, in addition to those personal goals I've set for myself that I have yet to actually achieve. And I mostly agree with the differences between the game of 2004 and 2011. However, I don't think I'd want to see a rerelease of the '04 version of the game - I think that would make more people angry than it would make happy, I doubt that many people would participate in it, and of course it would take a lot of resources on behalf of Jagex to manage that if it's possible at all. (while it would be good practice for Jagex to keep backlogs of old code, who knows if they actually do?)
Out of curiosity, what trouble did Crocefisso get into with readers for having an affinity for Construction?
As for the Construction question, see this article and then the associated discussion.
Mm, well even beyond the whole group of people who like to rant about every single update (that's just a given for RS, it seems), I think that would attract a lot of flak from those who like the current game, specifically because it would take/would have taken a lot of resources to put up and then to maintain. After all, those are resources that could be going towards the current game. And it's not like Classic, where they just continued hosting the game when they made an upgrade - this would be going back and opening up something that until now had been closed completely. This would also weaken their standing as a company just a tad, since they'd effectively be saying 'we admit that some people really don't like the changes we've made, so here', and admitting something like that doesn't always work well.
Also, while they might backdate their code, it's veeery unlikely that they would keep the player's logs from that far back - I'd give that a shelf life of 6 months or so, at most. Thus they'd probably either start everyone fresh and noobish again, or they'd carry over your current skills. If the former, I suspect there'd be a lot of people who would like to play the old game but don't want to grind their way to where they can do what they want - it's a pretty big setback, to have to start over again. If they simply carried over everyone's current levels, of course that's horribly polluting the system they just purified. (If they did manage to use everyone's '04 stats, that's still a fair bit of a setback, and everyone since then will have missed out entirely - I think that was their reasoning to offer the Classic Cape and also immediately open RS Classic for new registration, so that current players wouldn't complain about not having a chance to get the newfangled stuffs. Even if they had open registration for the new 'old RS', new accounts would start from scratch, which wouldn't exactly be fair either... though it might be the best solution.) No matter how they handled that, they'd get some angry commentary (though again, they'll get some of that regardless of what they do).
I suppose that's all a lot of wishy-washy speculation; I just have a feeling it wouldn't be taken all too kindly.
Also, thanks for satisfying my curiosity.
Edit: Oh, and NukeMarine reminded me of another thing which would probably get angrily contested - exactly what the cutoff/changeover date would be for the RS2/RS3 switch. I'm sure many would want to have this or that thing which was released after whatever date Jagex picked to be included in the old version, or insist that some such feature that was included shouldn't have been.