Those two seem very clear-cut. I haven’t ever seen time in any other format (HH:MM does not count as a different format), and there is zero benefit to the imperial system, other than Americans being used to it.
> Should we drive on the right side of the road or left?
I don’t think there’s much benefit in picking one over the other that isn’t related to economic factors (such as being able to import cars from neighbouring countries, but also the cost of redesigning all roads).
> Should we use imperial or metric system?
Those two seem very clear-cut. I haven’t ever seen time in any other format (HH:MM does not count as a different format), and there is zero benefit to the imperial system, other than Americans being used to it.
> Should we drive on the right side of the road or left?
I don’t think there’s much benefit in picking one over the other that isn’t related to economic factors (such as being able to import cars from neighbouring countries, but also the cost of redesigning all roads).