15 years ago, Disney released its first feature-length computer-animated film. That’s a pretty huge milestone, one that should probably be celebrated, or at the very least remembered. But the movie that ushered in this new era of Walt Disney Animation, paving the way for such zeitgeist-capturing blockbusters as Frozen and Zootopia, has been all but forgotten. Chicken Little, released on November 4, 2005 (and now streaming on Disney+), might not have left a lasting impression but it should still be commemorated. After all, this was a Disney animated feature that somehow weathered several regime changes, constant …