Platform · 2006–2018 · Cloud Scale
Hadoop Everywhere
MapReduce as lifestyle. The elephant in rooms that needed a spreadsheet.
Why Hadoop Everywhere became a costly fad
Hadoop failed as a default because most data problems are warehouse-sized, not Google-sized. Clusters became resume-driven infrastructure with 3am pager duty. Spark and cloud SQL absorbed the real workloads; Hadoop became a cautionary sticker.
Cost of the fad
What Hadoop Everywhere cost
Enterprises stood up Hadoop clusters for gigabytes of data that fit on one Postgres instance. Hadoop admins, ZooKeeper nightmares, and ETL rewrites burned millions before Spark and cloud warehouses retired the elephant.
Patterns

Compare with
Related
Platform · 2014–now
Apache Spark
In-memory data processing that made Hadoop feel overnight. Still the batch/stream workhorse under many lakehouses.
Practice · 2009–2019
NoSQL for Everything
Schema-optional databases sold as a lifestyle. Right tool for some jobs; default for none.
$ Startups ditched Postgres for document stores "because scale," then rebuilt relational integrity in application code — and paid twice when joins came back as a product requirement.
Platform · 2010–now
Elasticsearch
Full-text search and log analytics at scale. Powerful, hungry, and everywhere in observability stacks.