The kind of work solved by leetcode will be solved by AI. Testing for it interviews in a few years will make no more sense than testing for people to generate optimized machine code. (Unless you are a super specialized systems developer who actually writes such things)

This will enable engineers to focus on higher order problems, similar to how compilers and programming languages allowed engineers to be more productive than having to write assembly.

The way that this play out for software development is we may include gpt prompts to our code repositories and treating them as library functions or macros which could be compiled as regular code, or interpreted at runtime.