Not even the deterministic high-level programming languages have succeeded to make the assembly languages irrelevant, despite everybody claiming that this will happen.

While the amount of source code written in assembly languages is an extremely small fraction of the total existing code and only few programmers are competent to write such programs, that assembly source code determines a large fraction of the performance of the applications run on modern computers.

LLMs are likely to behave similarly, i.e. a good amount of programs will continue to be written directly in deterministic programming languages by competent programmers, while a greater amount of source code, usable for solving problems that are neither novel nor critical, will be generated by people with lower skills, with the help of LLMs.