I like it. Might start using it myself! I use mm, cm, m, km every day, so why not Mm! Definitely an appropriate unit for international-scale measurement, so it

I like it. Might start using it myself! I use mm, cm, m, km every day, so why not Mm! Definitely an appropriate unit for international-scale measurement, so it's weird we default to just using thousands of kilometres now that I'm thinking about it.