Take That, AP Style Court of Law Rules the Oxford Comma Necessary

It baffles me that this is even a discussion, haha.

If we were talking about whether it was REEEEALLY necessary to do something that required loads of effort and money, I could understand the resistance.

Is it helpful under many or most circumstances? Yes Does it require an infinitesimal amount of effort? Yes Why WOULDN'T you do it? Ego...