It's time to stop asking users for periodic password changes

Yes - I think it is a shame that what3words seems to have limited its appeal and adoption that way, and its home page now seems to be focused on attracting business use only.
But now that it has been noted that three random words makes a good password, I may think about using some grid references for notable locations to generate w3w ‘locations’ as passwords for the few things I do not let even a password manager manage (although I suspect that, sadly, some of those have password field lengths that will not accommodate this).