Micah Sweet
Level Up & OSR Enthusiast
What they haven't done before, however, is make such a rules revision while keeping the title of the book identical and not calling out an edition change. That's never not going to matter to me, and if they won't call it something different, I will. 5.5e works well enough.That's because it's the 9th time that the core books have been revised since Advanced Dungeons & Dragons came out in 1978 (and you have to ignore the D&D line before and concurrent to that in order to only arrive at 9). There have been many different naming conventions during that time.
What is an "edition" and what is not, is something of a muddled mess (which makes it "fun" to argue about!) But a DM has to decide to incorporate new rules (or not) whenever new rules arrive. Heck, that even includes errata!