This is a fascinating conversation about public transport design. This bit stuck out because I suspect there's an interesting parallel here with marketing/audience data. The extra detail just doesn't add that much value:
"This has interesting connections to another marketing craze, which is the notion of big data, the notion that we now have so much more data about individual people’s transport needs that this ought to completely transform how we plan public transport. And the message is always fundamentally, Grandpa, what did you do before we came along? How did you manage in the Dark Ages before we came along and showed you this? And the answer is, we did fine because most big data is big detail and the Tube isn’t going to change anything it does; the New York City Subway is not going to change anything it does, just because we now have data, knowing that at 07:34 p.m., six people from over here go over there to that park when the weather’s nice. That’s the sort of data we’re getting and it’s not relevant to the design of high-capacity transit systems. It is in the nature of highly efficient public transport that you do not vary your routing according to that sort of detail. And I want to say, a lot of fantastic things have come out of big data but it’s also been, kind of, comically oversold as information at a level of detail that isn’t actually relevant to how plan high-efficiency, high-[unclear] public transport."