> The business model is just screaming that GPL'd LibreOffice is toast.

or MS might find itself accidentally toasting themself

a lot of places (including very important MS Office customers) insist in a open document format for various reasons

if MS convinces people that LibreOffice and similar is toast because they can't afford keeping steep with the format in question because it's too expensive they also might end up convincing this customers that it's also too expensive to _them_, and try to find way to switch away from MS Office