There was certainly no "need", but you must admit more than a few people think there was very good reason to.
A lot of people have had their interest in D&D reinvigorated by the new edition. It's just a shame that there are also a lot of people who feel left behind by it all.
I agree.
But I think where the issue comes in is that the two games are still so far apart. They are certainly a lot of people who like both. But just as certainly there are a lot of people on both sides who like one and dislike the other.
From the WotC point of view it may as well be a proclamation that Major League Baseball has been banned and only the National Football League is permitted. A lot of people like both and don't really care. The people who hated all that baseball are thrilled. The people who love baseball are feeling betrayed. And they wonder why we can't have both.
Obviously the first response to that is: Wotc didn't come into you house and burn all your 3E books. And that is 100% true. But, at least at some level, there is importance to the name D&D and playing the current, actively supported of that big name game. So that creates some ill-will.
As I've said before, the name itself is not all that important to me personally. I really feel very fondly of old D&D for the great nostalgia of it. And they were good games. But only 3E is a "D&D" that is on my preferred play list. And not because it is D&D, but because of the mechanics.
But even with that I was disappointed when I learned more and more of the great departure that 4E was coming out to be. I had grown very accustomed to having the 800 lb gorilla cranking out product in line with my tastes. And for years I had been completely comfortable ignoring the biggest name in gaming. But, clearly, over nine years I became comfortable and complacent on that. And I'll admit that there was a chip on my should for some time.
Now, I know I've still got the "edition warrior" / "h4ter" label on me. (And I'm really not a hater at all.) But I don't believe I've had a chip on my shoulder in a while. At least not a sour attitude chip. I probably do have a "You wanna debate about it? I'm your huckleberry, lets have fun" chip. But there is a smile on my face. I have great games and I enjoy debating. Win/win
But just as some people have "you took my 3E" chips. I think at least as many people have "you are not embracing my 4E" chips. I think it comes down to the armchair psychology of "you don't agree with my opinion, I take that as a personal insult". I read some posts and really get the idea that some people see a game they like and feel entitled to having the marketplace fall cleanly in line with their preference. And they get emotional when their divine right is not served.
I've had people directly tell me that 4E offers everything 3E offers and that the play experience at the table is identical, except easier to run. I don't see that as remotely true and I'm happy to debate the points that 3E does better.
I've had people directly tell me that the only reason there was a divide in the community was because 4E was new and campaigns had to roll over. That the divide was just a transitional blip. Granted, that argument is pretty well dead now, but I'm still happy to debate it.
There is not a lot of respect of "you enjoy your games for your reasons and I enjoy mine for mine" going in either direction.
Me, I love 3E. I'm happy playing it. I enjoy telling people why. I enjoy debating.