> code quality as we previously understood will not be a thing in 3-5 years

Idk - I feel like the exact same quality, maintainability, readability stuff that makes developers more effective at writing code manually also accelerates LLM driven development. It's just less immediately obvious that your codebase being a spaghetti mess is slowing down the LLM because you're not the one having to deal with it directly anymore.

LLMs also have the same tendency to just make the additive changes needed to build each feature - you need to prompt them to refactor first instead if it's going to be beneficial in the long run.