Hello Gordon,
I'm sorry to say but Yoga did just that.
He was stating that the reason for Powerpoint to dramatically increase the file size was to make sure the quality of the PDF is excellent in terms of resolution. He said it was an active choice by the developer team.
And that's why I was asking why then on a PC there is no such "automatic quality enhancement function". The quality on a PC is perfect but about 5% the size of the PDF generated on the Mac.
To me it seems like it was more of an attitude: we want people to migrate to PC's so let's decrease functionality and increase frustration so people will blame the Mac and migrate to a Windows system and keep buying Microsoft products. You might think this
a "conspiracy against Mac users" theory but there are numerous features in PC versions of Office 2016 products that are not available on the Mac version or only for Office 365 customers in conjunction with Mac Office 2016.
You might not share my opinion and you don't have to.