I agree, I've previously dabbled around with adding grain digitally, if you look at my post history you'll see a picture from Las Vegas a few years back that I went waaay overboard with unfortunately, though at the time I'd been using Lightroom for only about a week or so. I definitely have room to improve but I've found using real film and then adjusting colors, contrast, etc. In post results in a much nicer picture, albeit quite a lot more expensive to produce lol