That doesn't mean much. "Performance of neural nets" as compared to what? Yes we know if you have a database of everything then the neural net will be able to identify everything. We will never have a database of everything. Also this doesn't speak to complex programming needed to drive in adverse situations that neural nets can't handle. The type of situations they may come up rarely that are difficult to have a database entry for.
If ever FSD becomes common , then people will come up with creatives ways to spoof the cars into doing something they shouldn't do. In the end, if there is (remote) human driver assistance, that will take care of many of these odd situations.