I had four years of high school French and one year at university, and I was pretty conversational. How much did you use the language outside of class? A bunch of us high school French students would speak with each other outside of class, even just to make silly jokes in the language, which helped with retention.
>How much did you use the language outside of class?
Not at all. Which I think was my basic point. It was a class. I had no plans to move to France. Or any particular plan for French to be integral to subsequent education or career objectives.