OTOH Reddit also enforces time as a limitation on posts, just on a slightly slower scale than Facebook. For example "necroposting" isn't really a thing that's

OTOH Reddit also enforces time as a limitation on posts, just on a slightly slower scale than Facebook. For example "necroposting" isn't really a thing that's possible with a Reddit (or HN) model. Nor are threads that are ongoing for months at a time, which are quite common on traditional forums. I mean you can do it but it has to be mod-sanctioned via pinning.