Most overviews of aging suffer from multiple problems:

They dump a bunch of findings with no high-level picture.

Many of the claims they make are outdated, purely theoretical, and sometimes even outright disproven by existing work.

They are usually written by working academics, who are shy about telling us when their peers’ work is completely wrong.

They are shy about making strong claims, since this would also implicitly mean denying some claims of the authors’ peers.