Nothing is set in place. I suppose it's an invitation for other people to answer the question. If the answer should be comment or it breaks rules, we can handle that too.
I actually disagree with that the asker in that question says -- I think the argument "Plusle is made for different things" is meaningless and the answer gives pretty good advice. And this is sort of why there isn't a rule about this -- not everybody agrees on advice-based posts. The person who asks the question shouldn't have absolute control over which answers are acceptable.
And no, that isn't necroposting. I sincerely wish everybody would stop being so anxious about "necroposting" -- this isn't a forum. You can post wherever and whenever you like, as long as it's useful.