I don't know whether I'm in the minority here, but I've always felt that there was something appropriate about the tech/timeline oddities. I mean, I don't know much about Ireland, either now or fifteen-twenty years ago, but as far as the rest of it, I can't really see a better way to do a continuing, contemporary story.

Speaking of which, if you do intend to continue, I can only assume you'd want to re-update at some point. And I don't really think that juggling the old stuff over and over while also trying to move forward is wise, or best for the series itself.

But perhaps I am a special case. For several years I mostly read stuff that was written during or around World War II, and didn't have any problem with it. For that matter, I first picked up H. G. Wells a couple of years before YW. I suspect, now, that I wasn't ready for it yet, but the point is that I have no problem dealing with lower-tech assumptions.