Now I'm going to give you my sum opinion.
*SNIP*
Staying carries no immediate and realistic risk, and is stable, but stagnant.
Moving carries no immediate and realistic risk, and is stable, but growing.
We are not gaining members. We are maintaining a roughly consistent number. That number is not sufficient to run more advanced games. This number has not increased in my three years of participation. There is no validity to the notion our community is growing. We are simply cycling equivalent numbers. It is not broken in that respect, but it is stagnant.
There is no realistic reason to fear some sort of horde of n00bs charging over the horizon like a Mongol horde unless you believe they have a malicious logic built around the intentional destruction of this past-time. If they do not fit in, they will not be integrated, they will lose interest, and they will leave. That is human behavior. Failing that, moderators can be deployed--and by the way, they don't pay attention here as much as they should, and that is not a good thing in most instances, despite what some of you may think. You want the Wild West, go to *****. There is no reason to believe that n00bs would come in greater proportions than they already do. The issue of greater numbers period and orientation is an issue, but not an insurmountable one through the establishment, expansion, and refurbishment of institutions such as the Wiki, Guide, training NESes, mentoring, and so on. It would simply require greater input and a more diversified carrot-and-stick approach.
There is no realistic premise behind the fears of "data loss" or "work." Thunderfall changes where the URL is displayed on the main forum. You don't have to twitch a muscle or fire a single neuron. You're doing more work by arguing the point than you would have to if a move were settled.
There is no realistic risk of instability. If all that changes is where the link is displayed, how are we destabilized? We remain here. We are not thrown into disorder before having to deal with a (presumably) increased number of arrivals. There is therefore no instability.
There is no realistic reason to fear radical changes to our community. Change will happen regardless of whether you want it to or not. That's life. If you're here to affect that change and guide it, why should you be concerned? Some of you are worried about it occurring here, but most of the same of you have no qualms about spreading our hobby elsewhere where it will inevitably mutate out of control and become alien. I fail to see the logic.
So the question it really boils down to is: do you want to see more people, or not?
I do, because I like the prospects they enable for running a more diversified suite of settings, and in filling out existing genres of games.