Win 10, GTX 1080
Take a cube without top and bottom faces, just walls:
In 2.79 in object mode, in orthographic view top, left, right. etc., there were outlines visible when object was selected:
It's not the case any more in 2.80 2018-12-21 9dde3e42a7c5 :
The only way to see the object in this view right now is in edit mode. I think those outlines should always be visible, not only when selected. It would help people who work a lot in orthographic view.