Re: "...Incoming LibreOffice 7.3 to support Klingon and Interslavic" ...
You have tried using it in anger, haven't you? I don't deny the MS offering's utility, but the level of compatibility is LibreOffice is very good indeed. And as noted by the article, it's ability to recover damaged documents has literally saved staff around my office hundreds of hours.
Genuinely, don't knock it till you've tried it.