Long article titles behave badly, these are truncated at mid-page even when other UI element leave plenty of space. For example, on the page https://meta.wikimedia.org/wiki/Wikimedia_Foundation_Board_of_Trustees/Call_for_feedback:_Board_of_Trustees_elections/Discuss_Key_Questions the header looks like,

A related observation, perhaps we want to truncate the beginning of the text rather than the end, since the subpage name is often more important than the first elements of the title.