Well "solved" is a bit of a weird way to say it. Was it proven as true, or was it disproven? Both of those change things in different ways.
Proven true that it is a stable formula, then that's cool, and we know that issues with fluid simulations based off of that are a software and compute problem.
If it was disproven, then we learn precisely under what specific conditions nature becomes mathematically unpredictable, and then we can start developing different and better models.
