NDAs don’t touch the copyright of your speech / written works you produce after leaving, they just make it breach of contract to distribute those words.
Please just stop. It’s highly unlikely that any relevant part of any reasonably structured NDA has any material relevance to copyright. Why do developers think that they can just intuit this stuff? This is one step away from being a more trendy “stick the constitution to the back of my car in lieu of a license place” lunacy.
