I don't think making the user read instructions is the solution. Most (myself included) will begin typing before they finish reading.
The current trend to only show the password box after the username is provided doesn't have to be bad for password managers. I use loads of sites that do this (so they can support SSO) and they just use hidden form fields so the password managers know what to do.
I'd be curious to hear any suggestions you have for password managers to improve here though. I can't think of anything short of a .well-defined login route.
My company uses an SSO provider with Google Workspace. Most employees have no idea about any of that, they wouldn't know and probably would type their company password there.
The current trend to only show the password box after the username is provided doesn't have to be bad for password managers. I use loads of sites that do this (so they can support SSO) and they just use hidden form fields so the password managers know what to do.
I'd be curious to hear any suggestions you have for password managers to improve here though. I can't think of anything short of a .well-defined login route.