Sadly, the lock-in is pretty extreme… as is user inertia. Office 365 has made the problem worse as well, even if you have something like OnlyOffice that does a good job of compatibility with Office, it can’t sync with OneDrive.
If you collaborate with non-technical people, they will expect you to work in Office formats, and won’t even entertain discussion of any alternative.
Trump may flirt with anti-vaxx sentiment or climate denial, etc., but he can’t fully support those ideas. They’re very niche and he’d lose the centre if he did.
RFK Jr doesn’t hold back on those issues. For conspiracy types he is closer to their beliefs than Trump.