Boyle uses low budget guerilla film techniques for feature films sometimes. 28 Days was the first feature shot on consumer tape cameras, Canon X1 I think, and they compensated by using a lot of them at once.
Most expensive scene was an empty bridge in London at 5:30AM, IIRC, and they only had a few minutes to pull it off. Lots of cheap cameras gives you options, if you can work with resolution and lens and colourspace issues.
The dates are fuzzy, because generations are more cultural than clinical.
If person born in 1984 grew up thinking "I could get a good job but what's the point" and worried about nuclear war constantly, they might ID as genX.