Thank you everybody for your valuable comment. Like I've said in the post, this was my first attempt to explain my passion. I read every one of your comments, a

Thank you everybody for your valuable comment. Like I've said in the post, this was my first attempt to explain my passion. I read every one of your comments, and spent the next few days fully understanding their implications. This post is a bit biased towards what I've interacted with. I think I do have a good sample of various workflow, but there are obviously large number of databases and use cases that I'm missing, and my view of what is "modern" may not incorporate a lot of bleeding edge theory and technologies. Operational complexity is definitely my #1 concern. The service I originally maintained is a OLTP system, located at the top of the service & data dependency graph. Availability is the top concern. The current system I'm writing is metrics database. The operational burden is much lighter. It is almost a leaf node in the service & data dependency graph, and I can take downtime to restart the cluster. A very different workflow, indeed. Thanks!