This is still a big deal result with a lot of physical significance if it holds up.

Full Navier-Stokes are / were understood to model all of the important physics associated with continuous domain fluids. (Continuous domain here means we approximate the many, many particles of the fluid as a smooth, continuous substance).

In particular, Navier-Stokes are supposed to fully model fluids with turbulence. Turbulence is an everyday phenomenon that you can reproduce for yourself in your kitchen sink, and yet it is extremely difficult to formulate a mathematical function for it. Turbulence appears to be random if you look at it, and yet if it is produced by NS, then it is not random. Solving even the numeric approximations of NS for turbulent flows is difficult because the flows exhibit severe variation in velocity over wide ranges of time and distance scales.

Anyhow, if NS is a good physical theory it has to have a physically realistic solution to every physically-possible set of initial conditions and environmental forcing functions. In math terms this mainly means that all of the velocities, pressures, and forces have to be finite and smooth at all times. Step discontinuities don't really occur in the real physical world (although they do approximately occur).

This result would mean that NS is not the end all final theory for classical continuum fluids. The scenario constructed by OpenAI is claimed to be one that can (at least theoretically) be setup and run in the real world. But if we did that, the real world is certain to do something else besides the infinite flow velocity vortex that OpenAI claims NS predicts. What would really happen in that experiment? Who knows. We're gonna need to find some new physics to find out.

My understanding is that it has only been shown to have closed form analytical solution for very simple cases. "Solved" in this case would mean doing the same for more complex geometries. It would mean finding new functions like spherical harmonics or the Bessel Function.

surveilling users? chats are fed into the training data, I believe this is stated pretty clearly on every chat, something like "your chats are used to improve the model'

I'm aware that the data is used to train models. Most people know this, it's stated clearly. That's not the story here. The story is IP theft, not privacy.