[ssnistfajen]

It's the same thing as clutter but on a professional level. Eventually the collection becomes large enough that it is infeasible to catalogue every single item. Any museum only has a small fraction of its collections on display at any given time, so things that are low prio on the display rotation will also be low prio on the catalogue shortlist.

The British Musem only has 1025 full-time staff (Page #9 in this document https://assets.publishing.service.gov.uk/media/5a7c0c2a40f0b...), and I imagine only a small fraction of that number are experts who are qualified to perform cataloging operations. The number of people-hours required to go through 2.4 million pieces of artefacts likely exceeds any realistic projections.