Wiki rot is real, but this is a terrible idea. As others in this thread have pointed out, if you have a page (or twenty) in your wiki that capture information

Wiki rot is real, but this is a terrible idea. As others in this thread have pointed out, if you have a page (or twenty) in your wiki that capture information about arcane information that doesn't have even yearly applicability -- yet still may have applicability -- by deleting it you've willfully destroyed some organizational knowledge. Just as bad would be cases where editors don't even know if the information is still important, but due to the timestamp choose to delete it. This is as about as close to "throwing out the baby with the bathwater" as it gets.