- MS office compatibility
- tabs
- cloud support
- ribbon UI
Personally, none of those are even remotely relevant (and MSO compatibility is a given, which suite doesn't support docx etc these days?).
The only times I still reach for MS Office is when I need its million times faster speed compared to OpenOffice and friends (libre office, etc), for things like "sorting 20,000 lines of CSV in Excel using multiple column constraints because I need the first 100 entries after sorting" or "writing out some maths that doesn't justify using full-blown XeLaTeX", so... this just reads like a blog-shaped ad.
I'm curious to learn how much the author got paid to post this, given how little what-I-use-it-for-information there is in this post.