I agree, & also, I think it depends on the gender (or size) of the snake, since females typically tend to get larger than the males.
There could also be exceptions (not all snakes achieve the same sizes no matter what their gender), & there may also be ambiguous genders or possibly some that were misidentified, so it's very difficult to make any firm "rule" that links the gender of the BP to the size enclosure they need.
It would make more sense to suggest the minimum acceptable size of enclosure based on the size (primarily length) of the adult snake, but since snakes grow their whole life, that too is easier said than done. Snakes are "famous" for out-growing their enclosures- & most of us realize that when that happens, it's just time to size up the enclosure.
The OTHER problem though is that some BPs just seem to prefer tight quarters- they feel more "secure" & feed well that way, & go "off eating" when given all that "luxury space" we think they need. Then what? Ours are individuals. So perhaps that's the reason no one has attempted to update the care sheet.
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