WAP & the S3-Native Future — Week 4 CheckWeek 4 of Lakehouse & Table Formats: Write-Audit-Publish on branches, streaming ingestion mechanics, and the file-format frontier.

Expedia's branch-based WAP cut release costs up to 99%. What's the mechanism behind the number?

Netflix runs WAP across thousands of Iceberg tables. Why are both publish AND rollback nearly free?

The sharp edge in Iceberg branch mechanics that breaks fast-forward publishing:

Vanlightly's streaming-ingest comparison splits formats into two camps. Which is the split?

Equality deletes are called the 'trap door' of streaming upserts because:

Lance, FastLanes, and Vortex all attack the same Parquet assumption. Which?