Greetings!
Well, perhaps I am not an important demographic to WOTC. I understand that many gamers are casual players, or poor, or whatever--and only buy the effing Player's Handbook.
I, however, am a DM. I have more than an entire bookshelf full of books for D&D 3.0 and D&D 3.5E. I have spent probably $5,000 dollars on this effing company. I've probably spent $1,000 dollars or more in the last 18 months. Do the math. I own every rule-book and supplement they have produced--except some of the adventures, and MMV. Where I come from, that's a lot of money. I generally spend somewhere between $50 and $100 dollars per month, depending.
So, for all of the folks that are just tickled about switching to 4E, good for you! But please, don't be so condescending or dismissive of those that feel differently, because many of us have invested a rather huge amount of money into the current edition. Invalidating that edition--and all the money that it required--is not a pleasant process, or a very gratifying thought. Some of us are far more invested than others. It is not so simple and blase a matter to just go and buy the new damned edition, and move on *snap* just like that.
As for the often cited examples of smaller companies changing editions--well, here is something to consider:
Most of these smaller companies do not produce the same investment as D&D 3.5E has, so it's often a matter of producing a single new updated rulebook, followed by new supplements gradually. Also, many of the changes, are rather minor, allowing customers to change over in a granular, gradual basis--thus, there is far less gnashing of teeth. In addition, as mentioned, even when they do a major edition change, it is often only a matter of changing a few books. So, it is not a question of making someone's $5,000 dollar collection effing obselete--but merely a question of obseleting a few hundred dollars, at most.
D&D3.5E is an entirely different beast, and that should be obvious--if you are a DM that has invested like I have.
That is why many people are angry, and justifiably so. Yeah, I might buy 4E. But like when I got burned with constant edition changes with Games Workshop's Epic Space Marine, I said eff 'em, and have not been a customer in 12 years. So, changing editions with such a huge financial investment may not be a painless or inconsequential process, even for a large company. Needless to say, I am not about to invest $2,000 or more dollars--usually MUCH MORE--on a game that changes every five years, and expects me to rinse and repeat. That's not a HOBBY MODEL that I want to be a part of.
Semper Fidelis,
SHARK