Yet I look at the way the mmo market spawned so many weak clones and saturated the market, eventually turning to F2P/B2P models because they couldn't compete on equal terms with the daddy of them all.
It happened with the likes of the zombie survival game too. Even the Arma 2 mod DayZ was rapidly copied in sickening fashion, what did they call it? 'WarZ'?
Cosmos makes a good point here.
It's not so much a matter of having the features of ED, but being able to do them well. So while Michael, Sandro, Mike and the team might be happy to talk about having features, you're never going to draw them out on discussions about how it's done (technically) or the minutiae that makes it special.
Timing is important, but doing it better than the other guys is even more so.
WoW wasn't the first MMO to be released by a long way, there were many MMOs prior to it. Everquest was the first that reached a huge player base, probably because it coincided with the first wave of mass cheap internet access (prior to which you would be paying premium rates for an ISP).
But what WoW managed to do was offer the same accessibility as EQ, UO, AO, AC and make itself even more casual player friendly, whilst still offering a high difficulty for the hard core gamer. Other games attempted the magic formula before and since, but no game has done it as well.