Imho, that latest innovation actually makes sense because what's even point of reporting several years old post (unless its malware of course)? I might be wrong here, but seems to me that it was mainly used for the sort of stat padding and nothing else.
With such thinking, you can generally stoop to the point that let's not report any posts at all. They hardly interfere with anyone, judging by the number of reports, and no one notices the presence or absence of low-quality posts. Reporting a post from 2015-2017 may not make sense, reporting a post from 2020 does make sense, as topics containing such posts are often still active, and if they become a little cleaner, no one will get worse from this.
That's why I think theymos should implement something like reporting badges with some small perks so there's at least some incentive.
+1, that makes more sense than allowing reports of the old posts just for the sake of increasing post report number.
These are not my words about badges.