Functionality: being able to scroll the document/list with the mouse-wheel when dragging an item.
I’ve gotten spoiled by apps that have this feature and I miss it in Dynalist. Particularly when documents are long its much quicker, easier and more intuitive to be able to scroll while dragging something instead of waiting for the auto-scroll to catch up, or even using the shortcut keys.
EDIT: probably also worth noting, another large part of the reason I like this feature is that I get headaches/eyestrain very easily, and for some reason having UI elements move without me ‘controlling’ them (even something as innocuous as autoscroll) is quite taxing. In that way this might even be considered an accessibility feature.