I gotta admit it utterly baffles me. I mean, good grief, 4e's been dead and buried for over ten years now. Who cares? I LIKE 4e and I can't understand why every single time anyone mentions the dreaded 4e, the editions warriors come out of the woodwork to tell all in sundry how bad 4e is.
I mean, it used to be 2e, but, by the time 4e came out, that had largely died down. Now 2e gets put up on a foundational pedestal whenever someone wants to wax nostalgic about settings. But even imply that something 4e was done well and it gets dog piled. Every single time.
It's utterly bizarre.