Can everyone please read the article before criticizing? The article fully explains that you have the option to instantly, fully, cancel your old password (ie - the same behavior as now) if you want to. This is not any less secure than it was.
Have none of you ever changed your password on your laptop/iPhone/etc before and then gone a few days without typing it in - only to be stumped the next time you get a password prompt? I’m not even very old and have had this situation happen. In that case it’s helpful to be able to use the one you were using for the last year that you still remember.
As for “who changes their password without reason”… ummm… everyone that cares at all about security? Regularly changing passwords (even if just every year or so) is one of the simplest suggestions for password security.