I've only read July's article; this might be addressed elsewhere.
In one experiment some user's feed was chronological:
"[Using a chronological feed] led to people seeing more untrustworthy content (because Meta’s algorithm downranks sources who repeatedly share misinformation) [...]"
❓ Does the fact that they are seeing "more untrustworthy content" absent Meta intervention indicate the well has become so poisoned it is beyond fixing (or sufficiently testing)?