LLMs are definitely better quality today than 3 years ago at codegen quality - there’s quantitative benchmarks as well as for me my personal qualitative experience (given the gaming that companies engage in).

It is also true that the tooling and context management has gotten more sophisticated (often using models by the way). That doesn’t negate that the models themselves have gotten better at reliable tool calling so that the LLM is driving more of the show rather than purpose built coordination into the LLM and that the codegen quality is higher than it used to be.