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by imaginenore 3713 days ago
No one uses "mega" for grams either.
1 comments

Why not? It shows the relationship between itself and other metric units better than "tonne" does. It would start sounding natural if people started using it.
Because "mega" is ambiguous. It can mean different things.
Can it? How so? As a unit prefix, I only know it to mean "a multiple of 10^6"