then you need to remember for each domain which "version" are you at. imagine for 200 domains...
How often does this happen? In the past 10 years I've had to change exactly 0 of my passwords, let alone 200
I'm amazed you've literally never had to change a password; while there are plenty of sites that have never made me change my password, I find that I usually am made to change a password every month or two.