Great point! I mentioned it in the post, did you read it?
"Note that the properties of a relational database are well suited to online-transaction processing (OLTP). Such a system guarantees consistency and availability, and it supports extreme multi-tenancy. However, complex logic over large amounts of data does not perform well"
"Note that the properties of a relational database are well suited to online-transaction processing (OLTP). Such a system guarantees consistency and availability, and it supports extreme multi-tenancy. However, complex logic over large amounts of data does not perform well"