I'd like to live in a world where an LLM can exhaustively verify all C++, and where porting C++ codebases is safe and easy. However I'm not fully confident we're there yet.

Plus, there are a lot of pros to C++ which aren't so easily waved aside. The breadth and duration of support makes it almost impossible to kill quickly, imo. If a magical LLM bullet shot C++ dead tomorrow, many established orgs and projects would keep it rolling. It also sits in a funny spot where you can get pretty good performance from not-great code. And it is incredibly fun to write! Reading it is... another matter ;).

Edit: I'm sure dumping piles of money into abliterated models can get you quite far. ROI and correctness are the parts I'm still sus about, however I hope to be proved wrong.