(Disclaimer: although I have worked in game development for almost 14 years, I have never worked on a AAA project, so I really don't know how qualified am I to talk about).
This is technically true, but these are not cameras that players primarily use, and these are not cameras that art assets and their quality, texture resolutions and LODs are primarily optimised for and benchmarked by.
> They handle streaming pretty much seamlessly, and with no apparent bugs.
Yes. This, I completely agree with. But they are built by a studio that has built and QAed these systems for 20 years (or longer, if you include 2d GTA games). And in game worlds that are significantly less visually complex than Cyberpunk.
Don't misunderstand me. RDR 2 and GTA 5 are fantastic, stunning games. I loved these worlds. But from strictly technical standpoint, Night City has drastically more completely different assets next to each other.