Exactly a year ago I noticed that since moodle was using Bootstrap already (in themes) and jQuery was not "so banned" anymore I made a new post about this topic:
Tim's response was: "Why just give students a pre-defined list of possible options. Let them type there response like STACK does."
Type - LaTeX.
You can still use images and mathematical notations (and equation editor) in many standard question types and OU question types - one of my favourites is Drag and Drop Matching question type