[Suicide Junkie]

Except when trying to add multiple items.

Se4:
1,2,3 of that. 1,2 of those.

...With only small movements of the mouse down the list
...a list in which you can see 19-20 items without scrolling, rather than just 5 or 6


There is really no doubt that SE4's UI is vastly superior.
The debate is really whether SE5's UI is good enough on its own. I'd say a non-emphatic yes.