I've been a SQL DBA for just about 10 years, and my company's development teams have been really eager to adopt the likes of Cassandra and Couchbase for some of the applications. The main use case for couchbase so far is for faster and more flexible replication than what SQL Server can offer up. Flexibility will be addressed by json support in SQL 2016, but the replication does seem to be something that these technologies can do fairly well.
Now, I would guess I'm not alone, but I feel that I am shoehorned into the corner with SQL Server since I've been doing it so long, I have very little familiarity with the Linux OS, and I still feel that SQL is very predominant in the market.
However, I can't help but feel that Oracle and SQL are being crapped on at my current company, yet the adoption of Couchbase and others just feels like a fad to me.
So, I figured I would spawn a discussion here- is it a fad? If you have gotten exposure to it, how did you get involved (in my shop, mainly developers are deploying and owning it), and have you had success/see it succeeding long-term?