I don’t really get the nostalgia angle as it seems as many of those who are into this kind of thing are too young to have ever been in such a space, let alone worked in one.

I’ve worked in a place like this that was well past its prime and though uncanny, it’s certainly not creepy.

The illusion of infinitely twisting, identical corridors simply doesn’t hold up when you’re actually in a space like this, but only works if you’ve only ever seen these kinds of spaces from a still photograph on the internet (which is why the audience for this sort of thing is too young to have ever experienced it themselves).

Yes, it looks exactly like the stifling, sprawling suburban office complex I once worked in, but then I also remember the feeling of walking out the exit into a beautiful spring day.

For me, the feeling these “back rooms” evokes is more akin to being in school waiting for the bell to ring so you can go outside and play.

It’s strange when your own mundane experiences are fodder for a new generation’s horror fiction. Sort of takes the bite away from it.

I disagree. I too have worked in these environments. As mentioned in the article, and in numerous other references about the Backrooms - the creepiness stems partially from the "liminal" feeling of walking around large, man-made spaces that are totally empty. Think walking around a shopping mall after hours. I had several odd jobs before I was in college where I had to work overnight shifts, sweeping the floors of large department stores. That feeling of "empty watchfullness" was definitely a thing, and it's captured well by a lot of the Backrooms content.

The other aspect of "creepiness" stems from the idea that the Backrooms represent an endless, malevolent labyrinth. One of the scarier aspects of being trapped in the Backrooms (for me) is that you would just wander around until you died for lack of water and food, in a bland corporate office corridor with fluorescent lights buzzing overhead.