> That's a powerful thing. I have been working with people who know relational databases and OO. And I have been working with people who could only do one of these things.

I know with which group I prefer to work.

If a technology is used as a "don't worry: low barrier to entry" to keep the challenged on board, it will become a great measure for lack of competence if you know it.

Seriously, until now nosql advocates would use specific technical merits of the different options we have now, but "developers don't grok rdbms's": its not an argument. According to some, developers also don't grok fizzbuzz.

If you can't wrap your mind around set theory you should also not iterate through a collection of objects.