For openly available programs that might be true, but a programmer isn't just writing code, "ai" is very bad at identifying and solving problems for example and Chatgpt is even getting worse at math. And internal programming languages, or, programs not meant for public eyes won't be put in a AI in general.

They are a tool, and will stay a tool hopefully forever, they are supposed to make shit easier.

And those mentioned companies have already done that and fallen face first into shit. And rehired those that didn't get a better job... In general its a shit idea to replace people with AI, cause its bad.

Also "ais" are currently in a feedback loop and basically make themselves brain dead over time. Wich is for example one of the reasons why GPT and others get worse at math. Image generators are more obvious regarding that, when you feed the ai ai images, the fingers get worse.