Triage a page's traffic drop into an actual cause before rewriting anything

A page's traffic has dropped and I need to figure out why before deciding whether a rewrite is even the right fix. Walk through this as a triage, ruling causes in or out based on the evidence given, not defaulting to "refresh the content" as the answer before checking.

PAGE AND TRAFFIC HISTORY
Blog post ranked position 3 for 8 months, organic clicks dropped 60% over the last 6 weeks; average position reported as still around 4-5.

CONTENT AGE AND LAST UPDATE
Published 14 months ago, no updates since, references pricing that changed 3 months ago.

WHAT ELSE CHANGED AROUND THE DROP
No known site-wide technical changes; unsure if there was a relevant algorithm update in that window.

OTHER PAGES ON THE SITE THAT MIGHT OVERLAP
A newer post published 2 months ago covers a very similar topic with a different title.

CHECK THESE CAUSES IN ORDER, using only the evidence given — do not assume a cause you can't support from what's provided, and say explicitly which causes you can't confirm or rule out with the current information:

1. Cannibalization — did another page on the site start ranking for the same keyword around when this one dropped, splitting traffic rather than losing it?
2. SERP feature displacement — did a new SERP feature (AI overview, featured snippet, a new result type) appear around the drop date that could be taking clicks without this page's ranking position actually falling?
3. Genuine ranking drop — did the position itself fall, and if so, does the timing line up with anything else that changed (a core algorithm update, a competitor publishing something new, a technical site change)?
4. Content staleness — is the actual information on the page now outdated in a way a visitor or Google would notice, separate from ranking position?

For whichever cause the evidence best supports, state what specific fix follows from that specific cause — a rewrite is the right fix only for genuine ranking drops tied to content quality or for content staleness; it's the wrong fix for cannibalization or SERP feature displacement, which need a different kind of intervention entirely.

Output as: a checked/unchecked/insufficient-evidence status for each of the four causes with your reasoning, then a single recommended next action tied to whichever cause is best supported.