DS9 did use fairly massive numbers of Steamrunners
in those fleet shots, really. Norway
was indeed said to have been lost in cyberspace, not to mention being fairly low-res to begin with. And Olympic
might have been shunned in big fleet shots exactly because she wasn't CGI; in single-ship appearances, there would have been little plot demand for her. How many times did we see an Oberth
, the dramatic match of the portly Olympic
, in DS9? The show didn't often call for Starfleet "victim ships"...