That early CGI X-wing shot might have put ILM's model department out of business . . . in the same way that the "Terminator Salvation" CGI Arnold shots might have put all human actors out of business in 2009.
Possible is one thing, practical on a large scale is something very different.
But I agree, it is interesting that they managed to get the X-wings looking so realistic in the late 1970s. I also agree that entire mood of
ANH was wrong for CGI ships. The grittiness was a vital part of that movie's edge at the time.
(BTW: Maybe the CGI X-wing test shot really was from 1978, and the ILMers were worried about losing their jobs on ESB, not ANH?)
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