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Re:Why you should never use MongoDB (2013) by gaius on Monday August 15, 2016 @02:26PM (#12292366)
Indices are updated synchronously on every insert, slowing your writes, for the sake of transactional guarantees that most applications aren't written to take advantage of. Queries have to be passed over the wire as strings

Those are implementation details, not inherent properties of the relational model.

Re:Why you should never use MongoDB (2013) by EpicEng on Monday August 15, 2016 @06:45PM (#12294088)
If they're pervasive then it's irrelevant. Looking at this stuff from a purely academic viewpoint isn't useful to people who care about implementation details.