Was it breaking password managers? Because from what I understand, that isn't the case, and the bug linked earlier is specifically titled "autocomplete=off is ignored on non-login INPUT elements"

Also: "For most modern browsers (including Firefox 38+, Google Chrome 34+, IE 11+) setting the autocomplete attribute will not prevent a browser's password manager from asking the user if they want to store login fields (username and password), if the user permits the storage the browser will autofill the login the next time the user visits the page. See The autocomplete attribute and login fields."

(From: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/Fo...)