A wolf and a penguin could never live together, nor could a camel and a hippopotamus. That would be absurd.
And the older you get, the fewer things you really love. And by the time you get to my age, maybe it's only one or two things. With me, I think it's one.
MM units are not considered Light because LI units have some abilities that MM don't. You can treat them as "light" if you want. This is a carry over from the original game. MA are considered "light."
So should MA have a green box around their movement allowance then?