Okay, but the important question is, does the retcon has any effect to the present day? If not, I can just ignore it.
Same question with all of other retcon.
I want to say that sounds like making an excuse for bad writing, but considering the long history of comics, multiple writers and series running at the same time, I know it's not the case. Often the writing is fine, there's just so many of them someone bound to make mistake. It's still a problem though.
If a series has an inconsistent continuity, especially if it isn't clear when or where they change, and if I have to constantly adjust my expectation and mindset because of it, then it will affect my enjoyment. I shouldn't have to do that.
Unless I just read one story and stop, be it one issue or one arc. Then, I can just judge it by that story alone, since continuity doesn't matter in that context. Assuming of course, that one story doesn't rely on plot point in the 90s or whatever.
I haven't really decided how I want to approach this, but that's one method.
I'm ignoring the rest for now, because seems there are things people haven't agreed yet and. You can just tell me what's the conclusion.