https://keepassxc.org/blog/2020-08-15-keepassxc-password-hea...
This is because they create another problem when anyone you talk to will say they have their password and just increment a number for every password change. That way they’re not having to remember a whole new password every few months. So there’s never much of a change in anyones password during these rotations.
- abcde1 - abcde2 - abcde3 - …
However, if you use a password manager, and have access to it, I think forcing key rotation on a short schedule actually increases security. The downside of course being that most people don't use a password manager, and most people use the same relatively unsecure password for everything.
The policies are the problem and the industry has recognized it so they’ve moved away from those recommendations.
> Verifiers SHOULD NOT require memorized secrets to be changed arbitrarily (e.g., periodically). However, verifiers SHALL force a change if there is evidence of compromise of the authenticator.
Source: https://pages.nist.gov/800-63-3/sp800-63b.html#memsecretver