Yes the minimum version has been increased, recommended is a minimum length of 12 in that case without complexity rules. As long as you dont change the settings they stay as they where before. We highly avoid changing settings on upgrade for all users.

But as for improving the message I agree when that information is aviable we could show it to the message.

Understand it.
Joomla prefers not to change the settings with a migration.

It is nice if you can look to make the message clearer with the number in it.

Or below the field a message that it is possible that the number is too low comfor the new requirements of Joomla 4. With the message that it is now at least 8 or higher.
But that it can be lower if you have done a migration from 3 to 4.

Or ask a question about it during the migration process.

Changing the number does not affect current saved users only new ones

Changing the number does not affect current saved users only new ones

that is an missunderstading. As soon as the existing users want to change the PW they have to follow the new rules too.

Or ask a question about it during the migration process.

I would say that will make it much more complex for such a little change within the user settings.

Okay, but it is not a problem that if a user changes their password, they must now comply with the new rules.

As long as you get a clear message why the password is not accepted.

I understand it during the migration.

Yes that should already be the case what would be interesting is to look to improve the message you mentiond above when saving the options from the backend

I believe that this unclear message is the same as with #41140