ISTR answering this question last week. I disagree that it's been retconned.
I agree. There's been some modest tidying up from the early, multiple-writer, throw-everything-at-the-walls-to-see-what-sticks, period, but the narrative of Dredd is more or less a straight line from Prog 2 to today, with the odd thing swept under the carpet, and the occasional gap filled in (like Origins).
(Nobody has ever said that the more outlandish humour stories
never happened, for instance… they're just not directly referred to these days.)