I'd bet that there is more code written in the past 10 years that uses SQL, than that which uses "simple datastores". You don't hear it much, because it just works, all the problems are well known (and so are the various solutions & workarounds), and so it's boring. Whereas, "Company X has adopted No-SQL solution Y for its project Z! That means it works!" makes headlines.
Probably true as far as it goes. But I think that SQL is a smaller percentage of systems now than it was 10 years ago, and that the trend continues to be in that direction.
