i'm very sorry dan, i don't recall if i ever visited w20, did 21 i think and i never ventured as far as UK.
alot of us here have said when we have looked at other places nothing seems to compare to w9. maybe every player says that about their own world idk but those ones u mention, for me anyway, just don't compare to what has happened/been achieved in w9 by the remaining active tribes.
i suppose for worlds as old as ours it doesnt even have to be tribes that achieved/are a success at stuff, by now we could break it down to individual players and their successes.
then again everyone would have a different view on what they class as successful, most would probs say nobling the enemy represents ur success. i have always kinda gone with the view there is alot more to the game and winning than just that.
anyway putting my dribble aside, u and i just have different views, with different experiences in the game. i played another world very seriously at one point, coming in and out of w9 while doing it made the other seem a baby game. like stepping from w9 an adult game and going to visit a kindy for a while. nothing wrong with the other world, its just a different style of game. here everything seems more intense, from my point of view its always alive in here.
its very hard for me to imagine this world ending actually, not for a long time.