> It seems to me that existing good practices continue to work well. I haven't seen any radically new approaches to software design and development that only work with LLMs and wouldn't work without them.

I've been thinking about it lately and I think you are right. LLMs haven't changed what is 'good software'. But they changed some proxies I used to have for what is 'good software'.

In the past I've always loved projects that had good documentation, and many times I've used this metric to select a project/library to use. But LLMs transformed something that was (IMHO) a good indicator for "care"/"software quality" into something that is becoming irrelevant (see Goodhart's law).