War! Good God! What is it good for? I can't say I'm innocent when it comes to the edition conflict. I'm often vocal about what I like and don't like. This doesn't mean I'm right. I just know what I enjoy.
So I'll stay out of discussions about 4th edition - I never played it. I ran a good 3rd edition campaign but ended up selling the books because it wasn't for me. 2nd edition, well I reckon it's 1st edition with added fluff. They are certainly highly comparable. Then we get back to basics with brown books versus Holmes, Moldvay versus Mentzer.
Next? I'll borrow what I like and keep rolling.