Saving and autosaves take toooooo looooong!
Also loading small lisp routines the first time in a drawing. It just takes so long that my architect is getting angry with me. It even affects the autosaves in the drawings when he opens the drawings in AutoCAD. This is unacceptable and it's going to cost me my client! Or it might cost me full price for AutoCAD because my subscription is about to expire.