I wasn't thinking 'new driveway' when I said 2" of asphalt. I meant 4" as a minimum, and the only reason I think I was saying 2" was because I was thinking of resurfacing; not a 'new' driveway. Good catch, bc.
Yes, the more weight that's put on the driveway, the more asphalt and base you need. (That's why I was recommending the thicker base even though I got the - 2" thing - wrong.) No need to apologize. My brain was working faster than I could type. (Yes, it does work from time to time ...)