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On a multi-domain retailer (~4,200 Glue tables, 11 AWS accounts), publishing a stewardship RACI plus SageMaker Catalog subscriptions cut mean time-to-data-access from 19 days to 4 days — without replacing Lake Formation enforcement.
Copying curated Parquet into every consumer account is how data platforms drown in storage cost and permission sprawl. On Feb 11, 2026 AWS shipped Lake Formation cross-account version 5 — wildcard RAM shares for hundreds of thousands of tables. A composite 12-account platform cut duplicate curated copies from 3 to 0 and dropped cross-account access tickets from ~11/month to ~3 by standardizing LF-Tags + resource links.
July 2026: Amazon DataZone domain/project subscriptions on Glue + Lake Formation — pricing is requests/metadata/compute/tokens (not per-asset monthly), with a subscription pilot checklist.
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