Mostly the reasons are not of technical, but of political nature. I mean no one likes to be told that their language is "not good enough". Or "not safe enough". It is our instinct to defend what we love and have put so much time and effort into. But reality is, that Rust really helps eliminate whole classes of errors, that can happen even to the most experienced C or C++ devs.

Accepting that things will and should be rewritten in Rust - until an even better language comes along - is necessary. That does not mean that Rust needs to replace all code on earth. For sure there are many cases where it should not. But in the times of Fable and GPT 5.6, it becomes even more important to reduce any attack surface as much as possible.

But to their credit, I was very sceptical about the statements that "90% of the code will soon be written by AI" and even though we might not be at that point, I am surprised how far LLMs have gotten and how useful they have become. I can hardly image developing software the "old" way where I actually write my code by hand, like I used back in the day. The frontier models have become so powerful that I find myself in moments of surprise, where the LLM actually thought of edge cases that I would have missed

I think the GIL provides python with a great guarantee, I would probably prefer single-thread performance improvements over multithreading in python to be honest.

Anyway if I need performance, Python would probably not be my first choice