I disagree with your use of the word zealot but I agree, MS Office is objectively the best office suite. I no longer use it daily, but anybody arguing otherwise has: never used it, never tried the alternatives to see how bad it can be, doesn't do collaborative work, or doesn't need any features beyond bold/italic. For example I can do most of my coding in Notepad, but it's still a very inferior experience. I feel the same way about MS Office vs LibreOffice.

That being said let's keep in mind that the latest wave of moving-away-from-MS-Office is using OnlyOffice this time and I believe it might work. OnlyOffice actually wants to entice MS Office users. And thus it is more compatible, has a much closer/better UX, and despite being a web app it is somehow more responsive than LibreOffice.