When I used Copilot autocomplete more I noticed myself slipping a bit when it comes to framework and syntax particulars so I instituted a moratorium on it on Fridays to prevent this.
Claude Code seems to be a much better paradigm. For novel implementations I write code manually while asking it questions. For things that I'm prototyping I babysit it closely and constantly catch it doing things that I don't want it to do. I ask it questions about why it built things certain ways and 80% of the time it doesn't have a good answer and redoes it the way that I want. This takes a great deal of cognitive engagement.
Rule nombre [sic] uno: Never anthropomorphize the LLM. It's a giant pattern-matching machine. A useful one, but still just a machine. Do not let it think for you because it can't.