He’s likely talking about how autocomplete=“off” is now ignored, and Chrome will “helpfully” display its own autocomplete on any textbox that look like address fields, which results in Chrome’s autocomplete being shown on top of the site’s own autocomplete. Progress.
Biggest problem for me when working on a web game was that it was autocompleting the password input for creating a new room with the password for your account (from the login screen). I found no way to disable their autocomplete.