@bragefuglseth uhm what exactly do you mean with "the vast majority of things people do with word processors"? People use them for letters (biggest use), forms and contracts (often strict formatting requirements), invoices (complex content, letterhead), academic papers and theses (very precise formatting requirements)... Markdown doesn't cut it for any of these. Google docs comes close but in reality people want Word because they need Word.
(Also file format compatibility)