> although I think this is now possible in 365

It would want to have improved since I used it a couple years ago in Word 2013. The main problem was with citation managers - Word would give a paragraph lock to you whenever you edited a paragraph, and it would only unlock that paragraph after a save (either auto or manual). Of course, when you have a citation manager, they have the habit of changing all the paragraphs when you insert a new citation that changes the numbering (ie. [1] becomes [2], etc.).