Q: I have 272 System fonts active. Is that necessary?

That's because you don't have the Microsoft Core Fonts installed.

If I did I would have even more fonts, wouldn't I?

Yes you would.

Hi Kurt, I have that regularly when receiving files from other systems (exemplo gratia Windows), and I even have never removed any fonts....

Hmm, can't explain that one. I should also note that I never use any of the templates that come with Office 2011, 2008, etc. If I did, I know for sure I would get messages about missing fonts since they use a variety of fonts installed by Office. But those I also set aside on another drive. If I need them, I can activate them at that time.

In Office 2016, all fonts included with that suite are within each of the five application packages (so it's a very large number of fonts repeated five times). But you can remove the majority of those, too. Which is 235 physical fonts, and 254 total when activated. Each of the packages contains two fonts folders. One called DFonts, which are all of the fonts you don't need and can set aside to be activated when you want, and another just called Fonts, which is a small handful MS considers should always be active for Office 2016.

You're welcome.