Yup, I agree with you. Most businesses can work fine with traditional RDBMS, even on TB scale if you have a large box with lots of RAM and SSDs. My example was

Yup, I agree with you. Most businesses can work fine with traditional RDBMS, even on TB scale if you have a large box with lots of RAM and SSDs. My example was just one use-case where one should consider using a more unconventional DBs like Cassandra or HBase.