What were their shortcomings with LibreOffice?

My dad complained about StarBasic being different enough from VBA to where he'd be forced to port over large amounts of his spreadsheets over. He also uses the paid version of Mathtype to do his equation editing, which I'm not sure would work in Linux even if Word did run on Wine, at least not the direct integration.

I am drawing a blank over what my mom was complaining about but I do recall that it was valid. Something to do with Word.

It's tough for me to give full rebuttals to any of this, because I don't really use any WYSIWYG stuff for documents anymore and just use Typst or LaTeX/Pandoc for everything now. That works fine on Linux but of course that's understandably a non-starter for most people.

At this point I think the only thing I could realistically do to get them to switch, and I doubt it would be successful, would be to convince them that Winboat would be fine.