Latest trick is to make a new standard font for Word (Aptos) that is proprietary and closed. Only available to word licensees.

In Aptos Microsoft has defined a very odd spacing of characters. The result is that if you as a LibreOffice user recieves a Word documents where the creator in Word just uses the standard font (Aptos), format changes will occur.

Past versions of Word used Arial as a standard font and that font was available to other platforms and products.

So Microsoft has once more been able to make rendering of docx files in other wordprocessors as difficult as possible. Every Word user will point at the alternative word processor as not good enough or faulty.

The solution is to persuade the Word users to use Arial, Liberation og another open font family as standard font in Word

Further more it uses the closed proprietary file format docx from Microsoft instead of the open international standards ODF.
I my opinion this product is just as bad as MSOffice.

But again if the look of the UI is the most important factor in ones choosing of a product, by all means choose MSOffice or OnlyOffice.

My personal choose is LibreOffice and Colabora. Both are pure open source, and uses the open free document format ODF as their native file format - even though they can read and write Docx as well

I haven't reallly needed them much for anything since school (computering isn't my work, just for funsies).

2007 and 2013 were my favourites, and OnlyOffice reminded me of using 2013.

LibreOffice is ugly (for my taste) and dark theming never worked properly. It always worked very well otherwise.