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>> "They ended up taking it out in 1998 because systems kept running out of disk space."

Reminds me of Microsoft SQL Server removing support for natural language data queries, only to add it back years later.

It would be interesting to see a list of features from major database management systems that have been removed over the years.

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> It would be interesting to see a list of features from major database management systems that have been removed over the years.

The only other thing I can think of right now are in-memory optimized indexes (e.g., T-Trees) from the 1980s. These were later removed and replaced with B+trees (or skip lists if you're MemSQL) because CPU caches (SRAM) got much faster than memory (DRAM).

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