The metadata catalog category consolidated in 2025 and almost nobody wrote the post-mortem.
It wasn't a product failure. The ROI case never closed.
The original promise, and why it was reasonable
Document the estate, and analysts stop wasting weeks finding data. Lineage for impact analysis, ownership for accountability, classification for compliance. Alation, Collibra and Atlan are genuinely good at all of that.
Why the payback didn't arrive
| Problem | Consequence |
|---|---|
| Value tracks description freshness | Freshness requires manual work with no owner |
| Coverage decays quietly | Nobody notices until trust is gone |
| Describes, doesn't enforce | A documented rule isn't a control |
| Human-shaped output | Fine for someone who can ask a colleague |
A catalog's usefulness is a function of how current it is. Keeping it current is unglamorous, unassigned work — so coverage decays, trust follows, and the renewal conversation gets difficult.
What actually broke the model
Not a competitor. LLMs made "query the data" everyone's job overnight.
A description adequate for a human who could ask a colleague for clarification is nowhere near adequate for an agent that won't. Ask a catalog what net revenue is and you get prose someone typed in 2023. Ask whether this agent may query it and it has no opinion at all.
Where the spend is going
To layers that enforce rather than describe: definitions typed and executable, relationships proven rather than annotated, policy that runs rather than policy that's documented, and drift detected automatically because nobody updates a wiki.
The catalog told you what you have. The semantic layer decides what happens next.
The full breakdown — the consolidation history, why the ROI never closed, and what replaces the category — is here:
👉 The Decline of Metadata Tools: Why You Need a Semantic Compiler
Originally published at colrows.com/blogs/decline-of-metadata-tools
