Lots of justification in this. Just be the change you want to see.
I only work with libre formats at work. If someone wants to collaborate, they can easily install libre office or gimp or freecad or gnu cash or whatever. Most libre software is free and cross-platform.
Mostly I downvote people who post screenshots of headlines or tweets instead of posting a link to the source. IMHO we need better moderators to delete that crap, but I do my part.