I don't see what's wrong in trying to make sense of all the retcon that the strip has gone through.
Is It too much to establish, as best as possible given 40 years of history, some sort of canon.
I don't want to go down the shite route of American super hero comics nd keep resetting everything ad nauseam.
I don't really appreciate being accused of being too involved in this character and his history.
Let's do this in order. Apologies for editing your comments, but I felt the need for more clarity than you had provided.
1. Neither do I, although I think there's a difference between retcon and progression.
2. No, it's not, as long as you're aware it will be a loose canon, so to speak.
3. Neither do I, but I don't expect it to happen because it's just not necessary.
4. To my knowledge, nobody has made such an accusation.
Finally, to sum up: you should read more Dredd comics. They're very rewarding.