Whenever I have to work on a DRW with multiple section views and such things slow down to a crawl.
In fact I do think I had root canals that were less painful then working on a drawing with 1 top view and 3 section views.
Annotating, so slow that I can type an entire sentence before the first word is completely viewable on screen.
Zooming, panning, saving it all takes such a long time.
Okay, my workstation is 7 years old as is my graphics card but would that truly be the reason why ?