Partly it's an issue of how they are positioned on a character sheet.
If they're listed vertically with the modern order, then STR is "on top" and Charisma is "on the bottom", and I think that has some bearing on how people view things and how they interact with the character sheet and therefore the character.
I think a horiztonal arrangement is better because it puts all the abilities at the "same level". You still have the reading left-to-right issue, but I think it's less of an issue than the vertical option.