I'm going to be contrary, though, and also agree with you. 2000 AD does rather have it's cake and eat it. It set up what seemed like an edgy conceit way back in the mists (Dredd ages in real-time), but at a point in time when none of the creators could assume that the comic would survive more than a few years.
Of course, this allows wonderful things like characters who start out as children but then grow up (as with Beeny), but on the flip-side, you don't want to age-out your successful characters, because they're your f*cking IP, man!
Oh, there's no way Mario would still be working as a plumber after all this time. Oh well, then. Never mind that we could release yet another Mario game and make millions - let's just shelve it because it's not realistic. Yeah...not going to happen, is it?
I notice that in Regened, it's clear we have to distinguish between Dredd and Cadet Dredd, but with Anderson - who cares? There's no clear indication with the Regened Anderson that she's any older or younger than most of her regular prog appearances.
I'm not really going to reach a conclusion, here. It's just that popular IP is worth something, and so is having a believable world that moves through time. How long it can be fudged to keep the merry-go-round spinning, I don't know. In all likelihood, it's the long-term readership that's going to age out (in reality) long before the valuable IP gets shelved in favor of consistent fictional world timing.