This has been reposted so many times. It's obviously a work in progress, with the wood from the stairs missing. The floor doesn't look finished as well.

I used to live in a home with a spiral staircase very similar in construction to the stairs in the picture. Once I removed all the wood in order to clean, fix and re-finish the wood. With the wood removed it was in fact a death trap like shown in the picture. I replaced the wood with temporary OSB cut to the right size, which actually looked kinda cool.

This is clearly a work in progress. The stair planks are meant to bolt onto those reinforcement beams, and likely a hand rail will appear for the last half of it.

WHY ARE THEY SO THIN

It does look pretty cool

My dog refuses to go up or down some types of stairs.
I get it now.

I'm a handyman. This will not pass an inspection because it lacks the handrail necessary to be code compliant. That's before even getting into tread width and lack of trip resistant rise.

I remember at my college we had stairs that had holes on the side (from the top down it covered the whole area probably with some overlap) and I used to have dreams/nightmares of having to do parkour to get through the place

Imagine being drunk

Don't run down right after hopping out of the shower

I actual quite like this. It looks totally impractical at best and dangerous at worst, but I think it looks pretty cool.

Upstairs is where they keep all their drug money and exploits. This is a passive way to deter their parents from exploring.

Definitely looks like something an architect would create...

Shame

Shame

Shame

Tell me that you don't have children (or older parents) without telling me that ..

That said I like floating stairs slightly more than these but these are good with me.

... And slice them off on the way down.

In so much of this cookie-cutter "hip" newer housing, it's either this or a dangerously steep angle, sometimes even both at the same time.

Enshittified architects building enshittified spaces thinking only of how it looks, not how it's supposed to be lived in with safety and comfort from Day Two onward, the novelty wears off very quickly and you're stuck with an unnecessarily, potentially deadly space.

Add some dark wood planks or glass platters as steps and we're good.

Made from the strongest aluminum