Re: >> I do not need DropBox Plus, nor OneDrive.
>"So I need Word, and only Word, and only as a desktop app, and only to check how the files I _send_ will show up at the other people's end."
If I may say here, obviously there is always the special case. I mean, the Mac users who go on and on and on about Photoshop and how Linux, say, is crud because it does not have Photoshop, Photoshop, Photoshop...
But 98.86473% of users do not need anything like the power of Photoshop for their needs. But I know from painful experience that the Graphical artists working on Mac will INSIST that everyone does, indeed, need Photoshop. [I'm not accusing you of that, BTW, just giving the comparison. A lot of Mac users assume the entire population of the world are graphical artists. It's kinda weird.]
Yes, in your use case it's Office. End of story. I can understand that. Ditto that Graphical artists needs Photoshop. It's a given because of the history of the industries and the software that was standarised upon long ago.
But, contrary to popular opinion, the exception does not make the rule. Are the vast majority of businesses, leave alone users, using Office Macros to death? No. Yes, I lot of companies do but worldwide, and across multiple industries... no. We did not even use Office macros in the software house I was in back in the old country. Average user does not deal in complex documents or needing back and forth editing. If I really, really need to preserve formatting, I send as PDF. My students are also having to use Google Docs a lot for back and forth editing so Word does not come into the equation.
The niches do not determine overall usability or price/performance. I grant that Impress is lacking on Office regarding multi-media support - not that I do slideshows anymore - but other than that I find LO does far more than not only do I need, my business needs but every user I know here personally.
So, yeah, you gotta use Word. But the rest of the world...? Those running macros developed over the course of ten years; yes. But it kinda narrows down after that.