When the (generally nonsensical) title of a topic (question) is edited, will it be useful to keep the original one for the record?
(Edit) May be useful when we try to find a recent question by some remembered keywords, or to avoid a misunderstanding. Maybe you can add other reasons. (/Edit)
Two topics (questions) whose titles were changed:
Related question relevant to the previous site manager: Editing question titles (and disabling links on other pages)