The relevant concern for necromancy in this situation is having old, 'stale' questions pollute the active list.
The only negative reaction I've seen vocalized was an incident a while back (I can't find the link to the relevant meta topic) where someone has made many edits to old posts, bringing a whole bunch of them to the active list at once. (or threatening to -- I don't recall if the edits went through and people complained, or the edits were rejected with this rationale)
Of course, just because nobody complains out loud on meta doesn't mean it doesn't bother people and doesn't cause problems. But even if necromancy is ultimately a bad idea, I expect the status quo to have too much inertia for anything to change until enough of it happens at once to cause a big problem, rather than a minor problem people find easy to dismiss.
The top related question is from nearly two years ago on this topic. The top voted responses were essentially "answer them" and "responsibly answer those questions with wide appeal in favor of those with niche interest". But, to be fair, nobody put forth an answer that makes the case for the alternative.