I also use open source office programs. Honestly if it were for me I would write my slides in latex.

Note that I did not say create a presentation. I said open a presentation.

The document in particular has a load of animations, videos, and "rich" powerpoint resources that have been carefully and purposefully designed to be difficult to interop with other software.

Remember?

"One thing we have got to change in our strategy – allowing Office documents to be rendered very well by other people's browsers is one of the most destructive things we could do to the company."

https://web.archive.org/web/20110930232927/http://antitrust....