The AP Stylebook is a fine guide for journalists. For consistency and efficiency, it works. On occasion, it changes with the times, mostly for the better.
At other times it clings to its preferences in spite of countervailing arguments. I have made such arguments, drawing my evidence from such guidebooks as "The Elements of Style" by Strunk & White.
For example, Professor Strunk, before Mr. White joined the act, preferred what we now call the serial or Oxford comma, that final comma before “and” in a series. Strunk’s example is: