yes, your suggested node Reposting Questions? was really good reading to my question, but there's still some drawbacks -- users still must count on calculating a probability of an answer (not holidays, not weekends, just bad current carma on perlmonks due to a person that irritated anyone, like me now).
I think this should be improved somehow, but have no 100% solution.

reposting questions, even with pointing to a past questions with many politeness, could not work forever, you'll make readers angry after 3rd post.

And no, I'm not complaining about questions that could not be easily answered. I think there's distionction between "zombie" questions and "dead" questions, which should not be answered due to some reasons.