Consensus can change is the three-word heading inside Wikipedia's policy on consensus, shortcut WP:CCC, and the sentence beneath it does real work: a decision reached in one discussion stays open to a better one, forever. People who cite the shortcut to reopen a settled question almost always skip the second half of the idea — that changing a decision takes a changed reason, not just a second request.
A regional literacy nonprofit's Wikipedia article carried a standalone section titled Funding controversy from a 2019 talk-page discussion: three editors weighed in, an uninvolved editor closed it, and the section stayed separate from the main history rather than folding into one paragraph. Seven years later, the nonprofit's newly hired communications director opened a fresh thread asking for exactly that merge, arguing that the organization had moved past the episode. The editor who answered checked the article's four citations against what had run since 2019: nothing had. The thread closed the same day, citing WP:CCC directly — time passing is not, on its own, a changed circumstance.
WP:CCC lists exactly that kind of trigger, and nothing resembling patience. A subject's own sense that enough time has passed carries no more weight on a Wikipedia talk page than it would in an appeals court — what moves the needle is new material the first discussion never had in front of it.
Consensus can change... Even well-established consensus can be revisited and changed, especially if it is felt that circumstances have changed, or that the actual result of a decision is not what was predicted.
Reopening one properly starts with naming the change out loud, in the first sentence of the new thread: a court filing unsealed after the original close, a guideline rewritten since, a merger that genuinely altered the facts the earlier editors were working from. It continues by linking back to the old discussion rather than pretending it didn't happen, since a closer who finds the new thread first and the old one second tends to ask why the second request skipped the first result. And it holds up best when the notice reaches whoever already watches that page or discussion venue, not a hand-picked list of people likely to agree — the same neutral audience a legitimate relisting would reach on its own.
A packaging company's article showed the other half of the same test four years later. A 2020 discussion had merged a discontinued product line into one sentence of the main article, with no objection and no real debate. When the line relaunched under new ownership in 2024, two trade publications covered the relaunch in enough depth to support a standalone paragraph again. The editor reopening the question led with those two citations in the first line of the new thread, not with how old the 2020 decision was. The discussion closed in four days, unopposed.
Treat an old consensus as a snapshot of what the sources supported on the day it closed. What reopens it afterward is always something that showed up since — a new source, a new fact, a rewritten guideline — and never simply how long ago the first answer arrived.