I'm assuming the original reason is lost in the mists of time, but one advantage it has when calling/using external/3rd party code is in style conventions. If i

I'm assuming the original reason is lost in the mists of time, but one advantage it has when calling/using external/3rd party code is in style conventions. If in my code my convention is to use functionNames but in yours you use functionames or FunctionNames, I can still code in my style after include()ing your file. A small advantage, granted.