For a while I thought it was annoying that Word wanted to save my documents in the cloud but then I realized I could keep my lifestyle diary for my nutritionist in Word and update it on my iPad on the go and it works great.
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.
I use Libreoffice and I ... objectively... find it slightly less of a pain in the ass.
This is a pretty biased take. If there is anything the world is finally learning, it is that being completely dependent (not only for functionality but also availability) on a single vendor operating from a potentially uncooperative government, is not a great position to be in.
Open source developers work on Linux. What you're saying presently makes no sense at all.
That is, a lot of us use plain text editors together with systems like markdown or restructured text or TeX. We never touch a WYSIWYG editor or if we do it is embedded in a web page.
If you look closely at how WYSIWYG editors behave (selections, cut-and-paste, etc.) you realize there is something conceptually wrong with the model behind them that causes them to misbehave, at worst they can seem like they are possessed by the devil. Word has problems but other editors, especially those ones embedded in web pages, are worse. I think plain-text editors in the open source world are fantastic but the WYSIWYG tools are awful... and plain-text tools are kind of a "blub" vs WYSIWYG tools, but you can live a great document life with them.