Agreed. It takes children about 7 years of intense exposure and practice to become fluent in their native language, and many more years to become really eloquen

Agreed. It takes children about 7 years of intense exposure and practice to become fluent in their native language, and many more years to become really eloquent and quick-witted. Any adult who invests 7 years into intense exposure and practice can reach a pretty good level; there are aspects that are more difficult for them (accent!) but they also have the advantage of being able to read, take classes, ask specific questions about the language, etc.