[2026 update] New subcategory: rationale and scope

What I would tell a new member reading about New subcategory for the first time: the confident posts are not the reliable ones, and the reliable ones are longer.

Adding the measurement that post #48 says would settle it.

New subcategory was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.

This is the answer, and the reason it is the answer is the more useful part.

Picking up post #85: that is the part I would want checked first.

Practical experience of New subcategory, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what make it interpretable.

I read post #85 twice before replying, because I had assumed the opposite.

What I would check first on New subcategory is whether the thing being measured moved or whether the way of measuring it moved. Those look identical in a graph.

Post #124 is right about the mechanism and I think understates the practical bit.

Housekeeping announcement. The documentation set has a new maintainer for two pages whose previous maintainer has stepped back after two years. Both pages have been reviewed at handover rather than assumed current.

Not a conclusion. A place to stand while looking for one.

The rare case here is the one that costs somebody a week, though, and the common case costs everyone ten seconds. I think the trade is clearly correct.

The general case is well covered; this is the awkward specific one.

Thank you for announcing it in advance rather than after. The number of places that do the reverse is remarkable.