That’s nostalgia. I have nostalgia for it too, but the point is it doesn’t have anything to offer any of the vast majority of current players who started with 5e, and therefore have no memories, fond or otherwise. And if you make substantial changes, it loses what nostalgia value it did have.
Like I said - I'm not a fan of the original.
I tried to run it once twenty years ago or something, and I felt that it was everything that I
don't like about dungeons.
And yet, I'd be happy to see a new version, in particular if someone who worked on it was able to show what they feel is good about it, while fixing some of its flaws. Obviously, there is likely to be bits and pieces where there's nothing to be done - the parts where there's irreconcilable differences between what I want out of an adventure, and what it offers, but I suspect that it's not impossible to find a best fit line, where it would be good at what it does, and I'd be able to appreciate it for that, even if it's not ultimately my cup of tea.
But even new players who may have only heard of it in passing (if at all) are interested in that sort of thing. People enjoy seeing things with "history" make a comeback, even if (sometimes especially if) they're only vaguely aware of that history. It's just how it goes.
We
also enjoy new things. I certainly wouldn't want them to do
only remakes. But a remake here and there is fine, in particular for things that have made "Top XX" lists - and whether you or I liked it, it's done that.
