Just an anecdote, but I recently used LLM's as part of learning helmfile/helm/k8s. Mostly i used the LLM to help me find the right documentation. I know what concept I'm looking for, but i don't know what they call it in these systems. I suppose critically I never really asked it to write code for me, I asked it to help me find the concepts to read documentation about.

I haven't actually tried copilot so I can't comment directly on that, but I have found the general space of LLM's to be useful.