[bipson]

I guess there are just too many pages that break autocomplete, e.g. for username/password as a "security feature".

I encountered quite a few myself and was very annoyed. I guess devs took the "usability" side of the question.

EDIT: phrasing

[Aeolun]

But it’s not useable at all. A form without autocomplete is perfectly useable. A form with autocomplete where it’s not wanted is an absolute hindrance.

[lupire]

A non autocomplete password field is an absolute hindrance.