[smacktoward]

This technology has absolutely no comparison with SQL other than it persists data

Except that apparently under certain circumstances it doesn't persist data, which was the author's point.

Personally I wouldn't be upset about a limitation like the one described as much as I would be upset about the database not logging an error when it discards the data. Logs are a primary way you figure out what's wrong when your application isn't behaving as expected. If you open the logs and see a bunch of "32-bit capabilities exceeded, please buy a real computer" messages, you learn what the problem is. If the database error logs are empty, that implies that everything is working fine, when in this case it clearly isn't.

[ukd1]

You can get MySQL to do dumb stuff as well, though you have to specifically ask it to take more risks - http://dev.mysql.com/doc/refman/5.5/en/insert-delayed.html

Almost all of the complaints against MongoDB are down to assumptions and lack of understanding about the database.