Right. Like, my use case for SD cards is for my cameras. I want to take pictures and bring them home across international borders. And a 4TB card would be amazing, though probably not fast enough. I simply don’t put files that I don’t want people to find onto my SD cards in the first place.
Mostly just freeways. I don’t think it’s heavily enforced. The idea is that cars traveling at drastically different speeds on the same road are more likely to cause an accident. It’s best to drive “the speed of traffic” because that’s what is predictable. Roads should be designed in such a way to make the target speed limit the fastest speed at which most people feel comfortable anyways, rather than just obeying a sign. So a 20mph road should be skinny and not straight. A 70mph highway should be wide and straight. Back to the point, though, in a traffic jam, all the cars are slow and therefore the speed differential is small already and therefore no reason to ticket anyone.