General

I think they reclassified it to only >40 bmi because they didn’t find anything special about being over 40 bmi, at least medically. But that part makes sense, it’s just a size comparison thing which makes sense

Australia in 2023 statistics had 4.6% of adults with a bmi more than 40. Up from 2.2 in 2007.

In general, it is more about how the weight was gained as opposed to how much. (to a certain point.)