Green Knight said:We're talking about some pretty big changes, after all. No more THAC0. No more racial level limits. No more restrictions on what races can play what classes. Humans gaining the ability to multiclass just like other races. The elimination of old saving throws (Rod, Staff, or Wand, etc) in lieu of Fort, Ref, Will. Skill Points. Feats. And so on.
Some of us call those very small changes indeed. For example, it completely mystifies me why some people call THACO a big change.
Is "roll d20 and get at least 10" any different than "roll d20+5 and get at least 15"? Mathematically and probabilistically, they're absolutely the same thing.
I had "attack bonus" notation scribbled in the margins of my 1E DMG a decade before 3E. At no point did I think I was playing a different game.
Compared to wiping out hit dice, attack progression, spell system, classes and race that have been constant (and often literally copy-and-pasted) throughout OD&D, 1E, 2E, and 3E, the new edition doesn't remotely look like the same mechanical game system.