In reply to Howdy_McGee.

exposing user login name is a security threat especially for a site like that, as it makes it easier to DDOS a site as login attempts, even if using wrong password take a relatively huge amount of CPU resources by (the correct) design.

it is amazing to me that core is willing to break backward compatibility for UI candy like the text widget or gutenberg but can not break it to fix this kind of security issue.