These days, I'm firmly on the System Shock side of the System Shock/BioShock division that exists almost exclusively in my head, but I'll give Rapture this: it was goddamn stunning when I first took that bathysphere jaunt back in 2007. The barnacled art deco was a heck of a look, and it still is today. I can vouch for that: I replayed BioShock 1 and 2 just a couple years ago on my trusty Steam Deck.
In a recent chat with IGN, Irrational Games vozhd and 'the narrative Legos guy' Ken Levine said there's a reason for that: he's never been one to push hyper-real graphics tech to its limit. "I don't think we've ever been a company that was like, 'Oh my god, we need the latest and greatest technology,'" said Levine. "Outside of SWAT 4, we never really tried to do ultra-realism in our games."
