His point is definitely worth considering. I'd argue, though, that part of the 95% is about putting slack in the system. I don't want to have to wait for an Ube

His point is definitely worth considering. I'd argue, though, that part of the 95% is about putting slack in the system. I don't want to have to wait for an Uber to show up when an emergency arises. The tail case is often the only case that matters.