Arguably some of them are useful (speed? as much as I hate to say it).

I don't think the "don't drive anywhere near the edge of the lane" is a good practice. There are lots and lots and lots of good, pro-safety reasons to come near the edge of a lane, or even cross over it, and I'm not sure it's helpful to train drivers to stay in the geometric center of the lane. For example it's one of the things I hate about autopilot the most, the car tries too aggressively to center itself.