Ok, let me step back for a second and see if I can explain myself without annoying people.

Hopefully. At least give me points for trying.
What confuses me the most about all these canon discussions is how time can be considered a valid criteria for judging change. There are all sorts of ways you can judge a new idea - [MENTION=2067]I'm A Banana[/MENTION] outlined a number of excellent ones a few pages back, and I'm just going to piggy back on his ideas. You can judge the idea as to whether or not it makes sense, is it consistent, does it actually do what you are trying to do, does it interact in good or bad ways with other ideas. These are all perfectly valid and generally accepted criteria for judgement.
But, why is time considered valid? If the 4e archons, for example, had come first, then everyone's arguements in this thread would flip. 4e archons would be the "true" archons and the earlier edition ones would be bad changes.

In other words, the criteria has absolutely nothing to do with the ideas themselves, but rather, which one came first. The quality of the idea doesn't matter. It could be great, it could be terrible, but, since it came first, it cannot be changed.
How can that be justified as a valid criticism? Yup, the Great Wheel came first. Absolutely. No one is arguing that it didn't. Does that automatically make it superior to the Astral Sea? Why?
Now, you can certainly dislike the Astral Sea (and I'm just picking one example, feel free to choose your own). And you can make all sorts of arguments about why it is a bad idea - it cheapens the ideas of distinct planes, it makes the planes less interesting, I just don't like it. Fair enough. But, saying the Astral Sea is bad because it comes after the Great Wheel doesn't seem like a particularly convincing argument.
And, again, this is where I really get twisted around. Because if change is bad, then why isn't all change bad? I brought up the Paladin as an example, which is a complete rewrite from earlier editions, that passes without comment. When do we decide when change is bad? WotC has plunked two of the most iconic Greyhawk adventures (Against the Giants and Temple of Elemental Evil) into Forgotten Realms. That's a pretty big change no? But, apparently not, because, well, these are also probably the best selling modules in decades.
Change has a cost? When? We've just seen several huge changes to lore in the past couple of years - Elemental evil added to Forgotten Realms, The Ordning, class changes out the wazoo - that are passed without comment. I'm quite frankly at a loss as to how this actually gets applied. How do you decide if a change is bad or not?